node_modules: update (#325)

Co-authored-by: dawidd6 <9713907+dawidd6@users.noreply.github.com>
2026-09-29 12:28:07 +07:00 · 2026-09-25 18:42:41 +02:00
parent bd35283f19
commit 6d91308e46
19 changed files with 300 additions and 79 deletions
@@ -1,5 +1,22 @@
 # CHANGELOG

+## [10.0.10](https://github.com/nodemailer/nodemailer/compare/v10.0.9...v10.0.10) (2026-09-14)
+
+
+### Bug Fixes
+
+* derive the attachment filename from the basename of a Windows path ([c7cc7ce](https://github.com/nodemailer/nodemailer/commit/c7cc7ce41a3602441747476a2a2c4a8ff466a83e))
+* **dkim:** unfold folded header lines in linear time ([28a5909](https://github.com/nodemailer/nodemailer/commit/28a5909cec27646cb001dc7e97a8f5d26c973078))
+* **smtp-connection:** reassemble multiline replies in linear time ([f2d82fa](https://github.com/nodemailer/nodemailer/commit/f2d82fa84d47015a7bbb4253da61eeb778c658b1))
+
+## [10.0.9](https://github.com/nodemailer/nodemailer/compare/v10.0.8...v10.0.9) (2026-09-12)
+
+
+### Bug Fixes
+
+* **addressparser:** bound the '@' probe to the run being scanned ([1465c3f](https://github.com/nodemailer/nodemailer/commit/1465c3f5ff74a7c4fbbe9853bd01448bb92bf5b7))
+* **addressparser:** keep the text after a comment out of a quoted local part address ([2f36eb1](https://github.com/nodemailer/nodemailer/commit/2f36eb1aa1dd33e312411dc9b888548e14db54ee))
+
 ## [10.0.8](https://github.com/nodemailer/nodemailer/compare/v10.0.7...v10.0.8) (2026-09-11)


@@ -88,6 +88,29 @@ function _isWordCode(code) {
 function _isBoundary(text, at) {
    return _isWordCode(text.charCodeAt(at - 1)) !== _isWordCode(text.charCodeAt(at));
 }
+/**
+ * Offset of the first '@' in `text` between `from` and `to`, or -1 when the range holds none.
+ *
+ * indexOf would scan on to the end of the value, and the value here is a whole header. The
+ * walk below steps one whitespace delimited run at a time and only ever uses a '@' that sits
+ * inside the run it is on, so an unbounded probe rescans everything behind that run once per
+ * run and grows with the square of the header: 400KB of free text carrying no '@' took a
+ * quarter of a second. GHSA-v53p-9fqp-m79j took the pattern search out of this walk and left
+ * the probe unbounded behind it.
+ *
+ * @param text Text to look in
+ * @param from Offset to start at
+ * @param to Offset to stop before
+ * @return Offset of the '@', or -1
+ */
+function _indexOfAt(text, from, to) {
+    for (let i = from; i < to; i++) {
+        if (text.charCodeAt(i) === 0x40) {
+            return i;
+        }
+    }
+    return -1;
+}
 /**
 * Finds the offset LOOSE_TEXT_ADDR matches at, or -1 when it does not match at all.
 *
@@ -118,8 +141,8 @@ function _looseAddressStart(text) {
        while (runEnd < len && !_isSpaceCode(text.charCodeAt(runEnd))) {
            runEnd++;
        }
-        let at = text.indexOf('@', runStart);
-        if (at >= 0 && at < runEnd) {
+        let at = _indexOfAt(text, runStart, runEnd);
+        if (at >= 0) {
            let lastBoundary = -1;
            for (let k = runEnd; k > runStart; k--) {
                if (_isBoundary(text, k)) {
@@ -128,7 +151,7 @@ function _looseAddressStart(text) {
                }
            }
            let atomStart = runStart;
-            while (lastBoundary >= 0 && at >= 0 && at < runEnd) {
+            while (lastBoundary >= 0 && at >= 0) {
                // '[^@\s]+' has to cover a character before the '@' and '[^\s]+' one after it,
                // and the boundary that ends the match has to sit past both
                if (at > atomStart && runEnd > at + 1 && lastBoundary > at + 1) {
@@ -148,7 +171,7 @@ function _looseAddressStart(text) {
                    }
                }
                atomStart = at + 1;
-                at = text.indexOf('@', atomStart);
+                at = _indexOfAt(text, atomStart, runEnd);
            }
        }
        pos = runEnd;
@@ -275,6 +298,19 @@ function _handleAddress(tokens, depth) {
            }
        }
        else if (token.value) {
+            // An empty quoted string is dropped by the tokenizer, leaving no text token of its
+            // own for textWasQuoted to be recorded on, so the pair of quote operators right in
+            // front of this token is all that is left of it and the run it opens carries the
+            // quoting instead. Without this '""@example.com' reads as the bare '@example.com',
+            // the quotes never go back on, and the value is no longer an addr-spec a trailing
+            // comment can be peeled off of. It only ever opens a run: a run that already holds
+            // material collected outside the quotes is not a quoted string, whatever follows it
+            const prevPrevToken = i > 1 ? tokens[i - 2] : null;
+            const opensAfterEmptyQuotedString = prevToken?.type === 'operator' &&
+                prevToken.value === '"' &&
+                !!prevToken.noBreak &&
+                prevPrevToken?.type === 'operator' &&
+                prevPrevToken.value === '"';
            if (state === 'address') {
                // Handle unquoted name that includes a "<".
                // Apple Mail truncates everything between an unexpected < and an address.
@@ -302,7 +338,7 @@ function _handleAddress(tokens, depth) {
                data[state].push(token.value);
                lastChars[state] = token.value.charAt(token.value.length - 1);
                if (state === 'text') {
-                    data.textWasQuoted.push(insideQuotes);
+                    data.textWasQuoted.push(insideQuotes || opensAfterEmptyQuotedString);
                }
            }
        }
@@ -387,6 +423,18 @@ function _handleAddress(tokens, depth) {
        // Join values with spaces
        data.text = data.text.join(' ');
        data.address = data.address.join(' ');
+        if (addressFromQuotedText && data.text) {
+            // The mailbox is still sitting in the text, so it moves over here and is quoted
+            // before the recovery below rather than after it. Anything else the text holds
+            // came along with it: a comment ends the domain but leaves the atoms behind it in
+            // the same text, and '"user"@example.com(x)evil.com' was handed on as the address
+            // 'user@example.com evil.com', a second domain riding into the envelope recipient
+            // on a value that is no addr-spec at all (GHSA-g57g-f23g-4646). Putting the quotes
+            // back first is what lets the recovery tell the whitespace an addr-spec may carry
+            // from the wreckage trailing one, as only a quoted local part may hold whitespace
+            data.address = _quoteLocalPart(data.text);
+            data.text = '';
+        }
        _recoverAddrSpec(data);
        const address = {
            address: data.address || data.text || '',
@@ -400,9 +448,6 @@ function _handleAddress(tokens, depth) {
                address.address = '';
            }
        }
-        if (addressFromQuotedText && address.address) {
-            address.address = _quoteLocalPart(address.address);
-        }
        addresses.push(address);
    }
    return addresses;
@@ -126,11 +126,18 @@ class MessageParser extends node_stream_1.Transform {
        // signature covers exactly the bytes the receiving side canonicalizes
        // Only SP and HTAB fold a line, and only they are trimmed from the field name, the
        // same whitespace the relaxed canonicalization in sign.ts works with
-        const lines = (this.rawHeaders || Buffer.alloc(0)).toString('binary').split(/\r?\n/);
-        for (let i = lines.length - 1; i > 0; i--) {
-            if (/^[ \t]/.test(lines[i])) {
-                lines[i - 1] += '\n' + lines[i];
-                lines.splice(i, 1);
+        const rawLines = (this.rawHeaders || Buffer.alloc(0)).toString('binary').split(/\r?\n/);
+        // Unfold in a single forward pass and only ever test a freshly split line for the
+        // continuation prefix. Testing an already merged line instead would rescan a string
+        // that grows with every continuation line, so a header folded into many continuation
+        // lines (a large recipient list, for example) would take quadratic time to unfold
+        const lines = [];
+        for (const rawLine of rawLines) {
+            if (lines.length && /^[ \t]/.test(rawLine)) {
+                lines[lines.length - 1] += '\n' + rawLine;
+            }
+            else {
+                lines.push(rawLine);
            }
        }
        return lines
@@ -151,8 +151,10 @@ class MailComposer {
                data.filename = attachment.filename;
            }
            else if (!isMessageNode && attachment.filename !== false) {
+                // a backslash separates as well, so a Windows path does not put the sender's directories in the headers
                data.filename =
-                    (attachment.path || attachment.href || '').split('/').pop().split('?').shift() || 'attachment-' + (i + 1);
+                    (attachment.path || attachment.href || '').split(/[/\\]/).pop().split('?').shift() ||
+                        'attachment-' + (i + 1);
                if (data.filename.indexOf('.') < 0) {
                    data.filename += '.' + mimeFuncs.detectExtension(data.contentType);
                }
@@ -107,8 +107,9 @@ class MailMessage {
        if (this.data.attachments && this.data.attachments.length) {
            this.data.attachments.forEach((attachment, i) => {
                if (!attachment.filename) {
+                    // a backslash separates as well, so a Windows path does not put the sender's directories in the headers
                    attachment.filename =
-                        (attachment.path || attachment.href || '').split('/').pop().split('?').shift() ||
+                        (attachment.path || attachment.href || '').split(/[/\\]/).pop().split('?').shift() ||
                            'attachment-' + (i + 1);
                    if (attachment.filename.indexOf('.') < 0) {
                        attachment.filename += '.' + mimeFuncs.detectExtension(attachment.contentType);
@@ -1,3 +1,3 @@
 export declare const name = "nodemailer";
-export declare const version = "10.0.8";
+export declare const version = "10.0.10";
 export declare const homepage = "https://nodemailer.com/";
@@ -3,5 +3,5 @@
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.homepage = exports.version = exports.name = void 0;
 exports.name = 'nodemailer';
-exports.version = '10.0.8';
+exports.version = '10.0.10';
 exports.homepage = 'https://nodemailer.com/';
@@ -41,6 +41,8 @@ export interface SMTPConnectionOptions {
    greetingTimeout?: number | undefined;
    /** Time of inactivity in ms until the connection is closed, defaults to 10 minutes */
    socketTimeout?: number | undefined;
+    /** Largest single server response to accept in bytes, defaults to 1 MB */
+    maxResponseSize?: number | undefined;
    /** Time to wait in ms for the DNS requests to be resolved, defaults to 30 seconds */
    dnsTimeout?: number | undefined;
    /** Use LMTP instead of SMTP */
@@ -268,6 +270,7 @@ export type SMTPConnectionResponseAction = (str: string) => void;
 *  * **greetingTimeout** - Time to wait in ms until greeting message is received from the server (defaults to 30 seconds)
 *  * **connectionTimeout** - how many milliseconds to wait for the connection to establish (defaults to 2 minutes)
 *  * **socketTimeout** - Time of inactivity until the connection is closed (defaults to 10 minutes)
+ *  * **maxResponseSize** - Largest single server response to accept in bytes (defaults to 1 MB)
 *  * **dnsTimeout** - Time to wait in ms for the DNS requests to be resolved (defaults to 30 seconds)
 *  * **lmtp** - if true, uses LMTP instead of SMTP protocol
 *  * **logger** - bunyan compatible logger interface
@@ -51,6 +51,9 @@ const SOCKET_TIMEOUT = 10 * 60 * 1000; // how much to wait for socket inactivity
 const GREETING_TIMEOUT = 30 * 1000; // how much to wait after connection is established but SMTP greeting is not receieved
 const DNS_TIMEOUT = 30 * 1000; // how much to wait for resolveHostname
 const TEARDOWN_NOOP = () => { }; // reusable no-op handler for absorbing errors during socket teardown
+// how many bytes a single server response may occupy while it is still being received.
+// Generous compared to any real reply, it only stops a peer that never completes one
+const MAX_RESPONSE_SIZE = 1024 * 1024;
 /**
 * Re-interpret a server response stored in fake 8-bit byte-container form
 * (the result of chunk.toString('binary') in _onData) as UTF-8.
@@ -79,11 +82,19 @@ function decodeServerResponse(str) {
 * Called with the byte-container form the queue holds (see _onData): the check only looks
 * at leading ASCII digits and '-' of the last line, and a UTF-8 continuation byte is never
 * 0x0A, so line boundaries and the tested prefix are the same before and after decoding.
- * The last line is read with lastIndexOf rather than split() because a queue entry grows
- * with every chunk appended to it and only its final line matters.
+ * The last line is read with lastIndexOf rather than split() because a queue entry may hold
+ * a whole multiline reply and only its final line matters.
 */
 function isPartialResponse(str) {
-    return /^\d+-/.test(str.slice(str.lastIndexOf('\n') + 1));
+    return isPartialLine(str.slice(str.lastIndexOf('\n') + 1));
+}
+/**
+ * True when a single reply line is a continuation ("250-..."). Used where the line is
+ * already known to be one line, which skips the scan isPartialResponse needs to find the
+ * last line of a whole reply.
+ */
+function isPartialLine(line) {
+    return /^\d+-/.test(line);
 }
 /**
 * Generates a SMTP connection object
@@ -100,6 +111,7 @@ function isPartialResponse(str) {
 *  * **greetingTimeout** - Time to wait in ms until greeting message is received from the server (defaults to 30 seconds)
 *  * **connectionTimeout** - how many milliseconds to wait for the connection to establish (defaults to 2 minutes)
 *  * **socketTimeout** - Time of inactivity until the connection is closed (defaults to 10 minutes)
+ *  * **maxResponseSize** - Largest single server response to accept in bytes (defaults to 1 MB)
 *  * **dnsTimeout** - Time to wait in ms for the DNS requests to be resolved (defaults to 30 seconds)
 *  * **lmtp** - if true, uses LMTP instead of SMTP protocol
 *  * **logger** - bunyan compatible logger interface
@@ -146,6 +158,7 @@ class SMTPConnection extends node_events_1.EventEmitter {
        this.secure = !!this.secureConnection;
        this._remainder = '';
        this._responseQueue = [];
+        this._responsePartial = false;
        this.lastServerResponse = false;
        this._socket = false;
        this._supportedAuth = [];
@@ -714,28 +727,58 @@ class SMTPConnection extends node_events_1.EventEmitter {
        if (this._destroyed || !chunk || !chunk.length) {
            return;
        }
-        let data = chunk.toString('binary');
-        let lines = (this._remainder + data).split(/\r?\n/);
-        let lastline;
+        const maxResponseSize = this.options.maxResponseSize || MAX_RESPONSE_SIZE;
+        const data = chunk.toString('binary');
+        // A chunk without a line break only extends the line currently being received, so
+        // keep it in the remainder and leave that string unflattened. Splitting the whole
+        // remainder again on every chunk would rescan everything buffered for that line so
+        // far, which is quadratic in the length of a line the peer never terminates
+        if (!data.includes('\n')) {
+            this._remainder += data;
+            if (this._remainder.length > maxResponseSize) {
+                return this._onResponseTooLarge();
+            }
+            return;
+        }
+        const lines = (this._remainder + data).split(/\r?\n/);
        this._remainder = lines.pop();
        for (let i = 0, len = lines.length; i < len; i++) {
-            if (this._responseQueue.length) {
-                lastline = this._responseQueue[this._responseQueue.length - 1];
-                if (isPartialResponse(lastline)) {
-                    this._responseQueue[this._responseQueue.length - 1] += '\n' + lines[i];
-                    continue;
-                }
+            if (this._responsePartial) {
+                this._responseQueue[this._responseQueue.length - 1] += '\n' + lines[i];
+            }
+            else {
+                this._responseQueue.push(lines[i]);
+            }
+            // The line just added is the last line of that queue entry, so it alone decides
+            // whether the reply is still partial. Looking for the last line of the accumulated
+            // entry instead would rescan a string that grows with every continuation line,
+            // which is quadratic in the size of the reply
+            this._responsePartial = isPartialLine(lines[i]);
+            // Checked as each line lands, so a peer that never completes a reply cannot keep
+            // buffering, and the limit does not depend on how it split its bytes into chunks
+            if (this._responsePartial && this._responseQueue[this._responseQueue.length - 1].length > maxResponseSize) {
+                return this._onResponseTooLarge();
            }
-            this._responseQueue.push(lines[i]);
        }
-        if (this._responseQueue.length) {
-            lastline = this._responseQueue[this._responseQueue.length - 1];
-            if (isPartialResponse(lastline)) {
-                return;
-            }
+        if (this._remainder.length > maxResponseSize) {
+            return this._onResponseTooLarge();
+        }
+        if (this._responsePartial) {
+            return;
        }
        this._processResponse();
    }
+    /**
+     * Drops a connection whose peer keeps extending a reply it never completes, releasing
+     * whatever was buffered for that reply
+     * @internal
+     */
+    _onResponseTooLarge() {
+        this._remainder = '';
+        this._responseQueue = [];
+        this._responsePartial = false;
+        this._onError(new Error('Server response exceeds maximum allowed size'), 'EPROTOCOL', false, 'CONN');
+    }
    /**
     * 'error' listener for the socket
     *
@@ -876,6 +919,7 @@ class SMTPConnection extends node_events_1.EventEmitter {
        // part of the secured EHLO capabilities). STARTTLS response injection.
        this._remainder = '';
        this._responseQueue = [];
+        this._responsePartial = false;
        // do not remove all listeners or it breaks node v0.10 as there's
        // apparently a 'finish' event set that would be cleared as well
        // we can safely keep 'error', 'end', 'close' etc. events
@@ -85,6 +85,29 @@ function _isWordCode(code) {
 function _isBoundary(text, at) {
    return _isWordCode(text.charCodeAt(at - 1)) !== _isWordCode(text.charCodeAt(at));
 }
+/**
+ * Offset of the first '@' in `text` between `from` and `to`, or -1 when the range holds none.
+ *
+ * indexOf would scan on to the end of the value, and the value here is a whole header. The
+ * walk below steps one whitespace delimited run at a time and only ever uses a '@' that sits
+ * inside the run it is on, so an unbounded probe rescans everything behind that run once per
+ * run and grows with the square of the header: 400KB of free text carrying no '@' took a
+ * quarter of a second. GHSA-v53p-9fqp-m79j took the pattern search out of this walk and left
+ * the probe unbounded behind it.
+ *
+ * @param text Text to look in
+ * @param from Offset to start at
+ * @param to Offset to stop before
+ * @return Offset of the '@', or -1
+ */
+function _indexOfAt(text, from, to) {
+    for (let i = from; i < to; i++) {
+        if (text.charCodeAt(i) === 0x40) {
+            return i;
+        }
+    }
+    return -1;
+}
 /**
 * Finds the offset LOOSE_TEXT_ADDR matches at, or -1 when it does not match at all.
 *
@@ -115,8 +138,8 @@ function _looseAddressStart(text) {
        while (runEnd < len && !_isSpaceCode(text.charCodeAt(runEnd))) {
            runEnd++;
        }
-        let at = text.indexOf('@', runStart);
-        if (at >= 0 && at < runEnd) {
+        let at = _indexOfAt(text, runStart, runEnd);
+        if (at >= 0) {
            let lastBoundary = -1;
            for (let k = runEnd; k > runStart; k--) {
                if (_isBoundary(text, k)) {
@@ -125,7 +148,7 @@ function _looseAddressStart(text) {
                }
            }
            let atomStart = runStart;
-            while (lastBoundary >= 0 && at >= 0 && at < runEnd) {
+            while (lastBoundary >= 0 && at >= 0) {
                // '[^@\s]+' has to cover a character before the '@' and '[^\s]+' one after it,
                // and the boundary that ends the match has to sit past both
                if (at > atomStart && runEnd > at + 1 && lastBoundary > at + 1) {
@@ -145,7 +168,7 @@ function _looseAddressStart(text) {
                    }
                }
                atomStart = at + 1;
-                at = text.indexOf('@', atomStart);
+                at = _indexOfAt(text, atomStart, runEnd);
            }
        }
        pos = runEnd;
@@ -272,6 +295,19 @@ function _handleAddress(tokens, depth) {
            }
        }
        else if (token.value) {
+            // An empty quoted string is dropped by the tokenizer, leaving no text token of its
+            // own for textWasQuoted to be recorded on, so the pair of quote operators right in
+            // front of this token is all that is left of it and the run it opens carries the
+            // quoting instead. Without this '""@example.com' reads as the bare '@example.com',
+            // the quotes never go back on, and the value is no longer an addr-spec a trailing
+            // comment can be peeled off of. It only ever opens a run: a run that already holds
+            // material collected outside the quotes is not a quoted string, whatever follows it
+            const prevPrevToken = i > 1 ? tokens[i - 2] : null;
+            const opensAfterEmptyQuotedString = prevToken?.type === 'operator' &&
+                prevToken.value === '"' &&
+                !!prevToken.noBreak &&
+                prevPrevToken?.type === 'operator' &&
+                prevPrevToken.value === '"';
            if (state === 'address') {
                // Handle unquoted name that includes a "<".
                // Apple Mail truncates everything between an unexpected < and an address.
@@ -299,7 +335,7 @@ function _handleAddress(tokens, depth) {
                data[state].push(token.value);
                lastChars[state] = token.value.charAt(token.value.length - 1);
                if (state === 'text') {
-                    data.textWasQuoted.push(insideQuotes);
+                    data.textWasQuoted.push(insideQuotes || opensAfterEmptyQuotedString);
                }
            }
        }
@@ -384,6 +420,18 @@ function _handleAddress(tokens, depth) {
        // Join values with spaces
        data.text = data.text.join(' ');
        data.address = data.address.join(' ');
+        if (addressFromQuotedText && data.text) {
+            // The mailbox is still sitting in the text, so it moves over here and is quoted
+            // before the recovery below rather than after it. Anything else the text holds
+            // came along with it: a comment ends the domain but leaves the atoms behind it in
+            // the same text, and '"user"@example.com(x)evil.com' was handed on as the address
+            // 'user@example.com evil.com', a second domain riding into the envelope recipient
+            // on a value that is no addr-spec at all (GHSA-g57g-f23g-4646). Putting the quotes
+            // back first is what lets the recovery tell the whitespace an addr-spec may carry
+            // from the wreckage trailing one, as only a quoted local part may hold whitespace
+            data.address = _quoteLocalPart(data.text);
+            data.text = '';
+        }
        _recoverAddrSpec(data);
        const address = {
            address: data.address || data.text || '',
@@ -397,9 +445,6 @@ function _handleAddress(tokens, depth) {
                address.address = '';
            }
        }
-        if (addressFromQuotedText && address.address) {
-            address.address = _quoteLocalPart(address.address);
-        }
        addresses.push(address);
    }
    return addresses;
@@ -124,11 +124,18 @@ export default class MessageParser extends Transform {
        // signature covers exactly the bytes the receiving side canonicalizes
        // Only SP and HTAB fold a line, and only they are trimmed from the field name, the
        // same whitespace the relaxed canonicalization in sign.ts works with
-        const lines = (this.rawHeaders || Buffer.alloc(0)).toString('binary').split(/\r?\n/);
-        for (let i = lines.length - 1; i > 0; i--) {
-            if (/^[ \t]/.test(lines[i])) {
-                lines[i - 1] += '\n' + lines[i];
-                lines.splice(i, 1);
+        const rawLines = (this.rawHeaders || Buffer.alloc(0)).toString('binary').split(/\r?\n/);
+        // Unfold in a single forward pass and only ever test a freshly split line for the
+        // continuation prefix. Testing an already merged line instead would rescan a string
+        // that grows with every continuation line, so a header folded into many continuation
+        // lines (a large recipient list, for example) would take quadratic time to unfold
+        const lines = [];
+        for (const rawLine of rawLines) {
+            if (lines.length && /^[ \t]/.test(rawLine)) {
+                lines[lines.length - 1] += '\n' + rawLine;
+            }
+            else {
+                lines.push(rawLine);
            }
        }
        return lines
@@ -113,8 +113,10 @@ class MailComposer {
                data.filename = attachment.filename;
            }
            else if (!isMessageNode && attachment.filename !== false) {
+                // a backslash separates as well, so a Windows path does not put the sender's directories in the headers
                data.filename =
-                    (attachment.path || attachment.href || '').split('/').pop().split('?').shift() || 'attachment-' + (i + 1);
+                    (attachment.path || attachment.href || '').split(/[/\\]/).pop().split('?').shift() ||
+                        'attachment-' + (i + 1);
                if (data.filename.indexOf('.') < 0) {
                    data.filename += '.' + mimeFuncs.detectExtension(data.contentType);
                }
@@ -69,8 +69,9 @@ export default class MailMessage {
        if (this.data.attachments && this.data.attachments.length) {
            this.data.attachments.forEach((attachment, i) => {
                if (!attachment.filename) {
+                    // a backslash separates as well, so a Windows path does not put the sender's directories in the headers
                    attachment.filename =
-                        (attachment.path || attachment.href || '').split('/').pop().split('?').shift() ||
+                        (attachment.path || attachment.href || '').split(/[/\\]/).pop().split('?').shift() ||
                            'attachment-' + (i + 1);
                    if (attachment.filename.indexOf('.') < 0) {
                        attachment.filename += '.' + mimeFuncs.detectExtension(attachment.contentType);
@@ -1,3 +1,3 @@
 export declare const name = "nodemailer";
-export declare const version = "10.0.8";
+export declare const version = "10.0.10";
 export declare const homepage = "https://nodemailer.com/";
@@ -1,4 +1,4 @@
 // Generated by scripts/build.js from package.json. Do not edit by hand.
 export const name = 'nodemailer';
-export const version = '10.0.8';
+export const version = '10.0.10';
 export const homepage = 'https://nodemailer.com/';
@@ -41,6 +41,8 @@ export interface SMTPConnectionOptions {
    greetingTimeout?: number | undefined;
    /** Time of inactivity in ms until the connection is closed, defaults to 10 minutes */
    socketTimeout?: number | undefined;
+    /** Largest single server response to accept in bytes, defaults to 1 MB */
+    maxResponseSize?: number | undefined;
    /** Time to wait in ms for the DNS requests to be resolved, defaults to 30 seconds */
    dnsTimeout?: number | undefined;
    /** Use LMTP instead of SMTP */
@@ -268,6 +270,7 @@ export type SMTPConnectionResponseAction = (str: string) => void;
 *  * **greetingTimeout** - Time to wait in ms until greeting message is received from the server (defaults to 30 seconds)
 *  * **connectionTimeout** - how many milliseconds to wait for the connection to establish (defaults to 2 minutes)
 *  * **socketTimeout** - Time of inactivity until the connection is closed (defaults to 10 minutes)
+ *  * **maxResponseSize** - Largest single server response to accept in bytes (defaults to 1 MB)
 *  * **dnsTimeout** - Time to wait in ms for the DNS requests to be resolved (defaults to 30 seconds)
 *  * **lmtp** - if true, uses LMTP instead of SMTP protocol
 *  * **logger** - bunyan compatible logger interface
@@ -13,6 +13,9 @@ const SOCKET_TIMEOUT = 10 * 60 * 1000; // how much to wait for socket inactivity
 const GREETING_TIMEOUT = 30 * 1000; // how much to wait after connection is established but SMTP greeting is not receieved
 const DNS_TIMEOUT = 30 * 1000; // how much to wait for resolveHostname
 const TEARDOWN_NOOP = () => { }; // reusable no-op handler for absorbing errors during socket teardown
+// how many bytes a single server response may occupy while it is still being received.
+// Generous compared to any real reply, it only stops a peer that never completes one
+const MAX_RESPONSE_SIZE = 1024 * 1024;
 /**
 * Re-interpret a server response stored in fake 8-bit byte-container form
 * (the result of chunk.toString('binary') in _onData) as UTF-8.
@@ -41,11 +44,19 @@ function decodeServerResponse(str) {
 * Called with the byte-container form the queue holds (see _onData): the check only looks
 * at leading ASCII digits and '-' of the last line, and a UTF-8 continuation byte is never
 * 0x0A, so line boundaries and the tested prefix are the same before and after decoding.
- * The last line is read with lastIndexOf rather than split() because a queue entry grows
- * with every chunk appended to it and only its final line matters.
+ * The last line is read with lastIndexOf rather than split() because a queue entry may hold
+ * a whole multiline reply and only its final line matters.
 */
 function isPartialResponse(str) {
-    return /^\d+-/.test(str.slice(str.lastIndexOf('\n') + 1));
+    return isPartialLine(str.slice(str.lastIndexOf('\n') + 1));
+}
+/**
+ * True when a single reply line is a continuation ("250-..."). Used where the line is
+ * already known to be one line, which skips the scan isPartialResponse needs to find the
+ * last line of a whole reply.
+ */
+function isPartialLine(line) {
+    return /^\d+-/.test(line);
 }
 /**
 * Generates a SMTP connection object
@@ -62,6 +73,7 @@ function isPartialResponse(str) {
 *  * **greetingTimeout** - Time to wait in ms until greeting message is received from the server (defaults to 30 seconds)
 *  * **connectionTimeout** - how many milliseconds to wait for the connection to establish (defaults to 2 minutes)
 *  * **socketTimeout** - Time of inactivity until the connection is closed (defaults to 10 minutes)
+ *  * **maxResponseSize** - Largest single server response to accept in bytes (defaults to 1 MB)
 *  * **dnsTimeout** - Time to wait in ms for the DNS requests to be resolved (defaults to 30 seconds)
 *  * **lmtp** - if true, uses LMTP instead of SMTP protocol
 *  * **logger** - bunyan compatible logger interface
@@ -108,6 +120,7 @@ class SMTPConnection extends EventEmitter {
        this.secure = !!this.secureConnection;
        this._remainder = '';
        this._responseQueue = [];
+        this._responsePartial = false;
        this.lastServerResponse = false;
        this._socket = false;
        this._supportedAuth = [];
@@ -676,28 +689,58 @@ class SMTPConnection extends EventEmitter {
        if (this._destroyed || !chunk || !chunk.length) {
            return;
        }
-        let data = chunk.toString('binary');
-        let lines = (this._remainder + data).split(/\r?\n/);
-        let lastline;
+        const maxResponseSize = this.options.maxResponseSize || MAX_RESPONSE_SIZE;
+        const data = chunk.toString('binary');
+        // A chunk without a line break only extends the line currently being received, so
+        // keep it in the remainder and leave that string unflattened. Splitting the whole
+        // remainder again on every chunk would rescan everything buffered for that line so
+        // far, which is quadratic in the length of a line the peer never terminates
+        if (!data.includes('\n')) {
+            this._remainder += data;
+            if (this._remainder.length > maxResponseSize) {
+                return this._onResponseTooLarge();
+            }
+            return;
+        }
+        const lines = (this._remainder + data).split(/\r?\n/);
        this._remainder = lines.pop();
        for (let i = 0, len = lines.length; i < len; i++) {
-            if (this._responseQueue.length) {
-                lastline = this._responseQueue[this._responseQueue.length - 1];
-                if (isPartialResponse(lastline)) {
-                    this._responseQueue[this._responseQueue.length - 1] += '\n' + lines[i];
-                    continue;
-                }
+            if (this._responsePartial) {
+                this._responseQueue[this._responseQueue.length - 1] += '\n' + lines[i];
+            }
+            else {
+                this._responseQueue.push(lines[i]);
+            }
+            // The line just added is the last line of that queue entry, so it alone decides
+            // whether the reply is still partial. Looking for the last line of the accumulated
+            // entry instead would rescan a string that grows with every continuation line,
+            // which is quadratic in the size of the reply
+            this._responsePartial = isPartialLine(lines[i]);
+            // Checked as each line lands, so a peer that never completes a reply cannot keep
+            // buffering, and the limit does not depend on how it split its bytes into chunks
+            if (this._responsePartial && this._responseQueue[this._responseQueue.length - 1].length > maxResponseSize) {
+                return this._onResponseTooLarge();
            }
-            this._responseQueue.push(lines[i]);
        }
-        if (this._responseQueue.length) {
-            lastline = this._responseQueue[this._responseQueue.length - 1];
-            if (isPartialResponse(lastline)) {
-                return;
-            }
+        if (this._remainder.length > maxResponseSize) {
+            return this._onResponseTooLarge();
+        }
+        if (this._responsePartial) {
+            return;
        }
        this._processResponse();
    }
+    /**
+     * Drops a connection whose peer keeps extending a reply it never completes, releasing
+     * whatever was buffered for that reply
+     * @internal
+     */
+    _onResponseTooLarge() {
+        this._remainder = '';
+        this._responseQueue = [];
+        this._responsePartial = false;
+        this._onError(new Error('Server response exceeds maximum allowed size'), 'EPROTOCOL', false, 'CONN');
+    }
    /**
     * 'error' listener for the socket
     *
@@ -838,6 +881,7 @@ class SMTPConnection extends EventEmitter {
        // part of the secured EHLO capabilities). STARTTLS response injection.
        this._remainder = '';
        this._responseQueue = [];
+        this._responsePartial = false;
        // do not remove all listeners or it breaks node v0.10 as there's
        // apparently a 'finish' event set that would be cleared as well
        // we can safely keep 'error', 'end', 'close' etc. events
@@ -1,6 +1,6 @@
 {
    "name": "nodemailer",
-    "version": "10.0.8",
+    "version": "10.0.10",
    "description": "Easy as cake e-mail sending from your Node.js applications",
    "type": "module",
    "main": "./dist/cjs/nodemailer.js",
@@ -147,24 +147,24 @@
    },
    "homepage": "https://nodemailer.com/",
    "devDependencies": {
-        "@aws-sdk/client-sesv2": "3.1124.0",
+        "@aws-sdk/client-sesv2": "3.1131.0",
        "@types/node": "20.19.43",
        "bunyan": "1.8.15",
        "c8": "12.0.0",
-        "eslint": "10.9.1",
+        "eslint": "10.10.0",
        "eslint-config-prettier": "10.1.8",
        "globals": "17.12.0",
        "libbase64": "1.3.0",
        "libmime": "5.4.3",
        "libqp": "2.1.1",
-        "mailauth": "5.0.2",
+        "mailauth": "5.0.3",
        "prettier": "3.9.6",
        "proxy": "1.0.2",
        "proxy-test-server": "1.0.0",
-        "smtp-server": "3.19.7",
+        "smtp-server": "3.19.11",
        "tsx": "4.23.13",
        "typescript": "6.0.3",
-        "typescript-eslint": "8.69.0"
+        "typescript-eslint": "8.70.0"
    },
    "engines": {
        "node": ">=20.0.0"