build(deps): bump ws, engine.io and socket.io-adapter

[dependabot]

Bumps ws to 8.21.0 and updates ancestor dependencies ws, engine.io and socket.io-adapter. These dependencies need to be updated together.

Updates ws from 8.20.0 to 8.21.0

Release notes

Sourced from ws's releases.

8.21.0

Features

• Introduced the maxBufferedChunks and maxFragments options (2b2abd45).

Bug fixes

• Fixed a remote memory exhaustion DoS vulnerability (2b2abd45).

A high volume of tiny fragments and data chunks could be sent by a peer, using modest network traffic, to crash a ws server or client due to OOM.

import { WebSocket, WebSocketServer } from 'ws';
const wss = new WebSocketServer({ port: 0 }, function () {
const data = Buffer.alloc(1);
const options = { fin: false };
const { port } = wss.address();
const ws = new WebSocket(ws://localhost:${port});
ws.on('open', function () {
(function send() {
ws.send(data, options, function (err) {
if (err) return;
send();
});
})();
});
ws.on('error', console.error);
ws.on('close', function (code, reason) {
console.log(client close - code: ${code} reason: ${reason.toString()});
});
});
wss.on('connection', function (ws) {
ws.on('error', console.error);
ws.on('close', function (code, reason) {
console.log(server close - code: ${code} reason: ${reason.toString()});
});
});

The vulnerability was responsibly disclosed and fixed by Nadav Magier.

In vulnerable versions, the issue can be mitigated by lowering the value of the maxPayload option if possible.

8.20.1

... (truncated)

Commits

• bca91ad [dist] 8.21.0
• 2b2abd4 [security] Limit retained message parts
• 78eabe2 [security] Add latest vulnerability to SECURITY.md
• 5d9b316 [dist] 8.20.1
• c0327ec [security] Fix uninitialized memory disclosure in websocket.close()
• ce2a3d6 [ci] Test on node 26
• 58e45b8 [ci] Do not test on node 25
• 5f26c24 [ci] Run the lint step on node 24
• See full diff in compare view

Updates engine.io from 6.6.6 to 6.6.8

Release notes

Sourced from engine.io's releases.

engine.io@6.6.8

The ws dependency was bumped to ~8.20.1 following CVE-2026-45736.

Note from the ws maintainers:

Although the calculated CVSS severity is medium, the actual severity is believed to be low, as the flaw is only exploitable through misuse that is unlikely in practice.

Bug Fixes

• clean up resources upon WebTransport handshake failure (f86b95f)

Dependencies

• ws@~8.20.1 (diff)

engine.io@6.6.7

Bug Fixes

• close HTTP requests with invalid content type (fc11285)
• handle invalid packets when upgrading to WebTransport (1fa1f46)
• prevent WebTransport connections when a middleware is registered (d1f5aa9)

Dependencies

• ws@~8.18.3 (no change)

Commits

• ffe51e2 chore(release): engine.io@6.6.8
• f86b95f fix(eio): clean up resources upon WebTransport handshake failure
• 4276e59 refactor(eio): fix typo in the cookie option
• 5257ef9 chore(deps): upgrade to ws@8.20.1 (#5439)
• 439a8f6 chore(release): engine.io@6.6.7
• fc11285 fix(eio): close HTTP requests with invalid content type
• b059af6 refactor(eio): use plain IncomingMessage in the public API
• 4e85378 docs: fix various typos in test and documentation (#5481)
• d1f5aa9 fix(eio): prevent WebTransport connections when a middleware is registered
• b785377 docs: fix typos in the release notes
• Additional commits viewable in compare view

Updates socket.io-adapter from 2.5.6 to 2.5.7

Release notes

Sourced from socket.io-adapter's releases.

socket.io-adapter@2.5.7

The ws dependency was bumped to ~8.20.1 following CVE-2026-45736.

Note from the ws maintainers:

Although the calculated CVSS severity is medium, the actual severity is believed to be low, as the flaw is only exploitable through misuse that is unlikely in practice.

Bug Fixes

• do not skip local broadcast when publishAndReturnOffset throws (#5457) (f630158)

Commits

• 4faff49 chore(release): socket.io-adapter@2.5.7
• 8413bce chore(release): engine.io-client@6.6.5
• c10fe07 refactor(eio-client): improve JSDoc documentation
• 9349b14 refactor(eio-client): remove unused import
• ffe51e2 chore(release): engine.io@6.6.8
• f86b95f fix(eio): clean up resources upon WebTransport handshake failure
• 4276e59 refactor(eio): fix typo in the cookie option
• 5257ef9 chore(deps): upgrade to ws@8.20.1 (#5439)
• 439a8f6 chore(release): engine.io@6.6.7
• fc11285 fix(eio): close HTTP requests with invalid content type
• Additional commits viewable in compare view

[dependabot]

Superseded by #3377.