Sourced from ws's releases.

8.20.1

Bug fixes

• Fixed an uninitialized memory disclosure issue in websocket.close() (c0327ec1).

Providing a TypedArray (e.g. Float32Array) as the reason argument for websocket.close(), rather than the supported string or Buffer types, caused uninitialized memory to be disclosed to the remote peer.

import { deepStrictEqual } from 'node:assert';
import { WebSocket, WebSocketServer } from 'ws';
const wss = new WebSocketServer(
{ port: 0, skipUTF8Validation: true },
function () {
const { port } = wss.address();
const ws = new WebSocket(ws://localhost:${port}, {
skipUTF8Validation: true
});
ws.on('close', function (code, reason) {
  deepStrictEqual(reason, Buffer.alloc(80));
});

}
);
wss.on('connection', function (ws) {
ws.close(1000, new Float32Array(20));
});

The issue was privately reported by Nikita Skovoroda.

8.20.0

Features

• Added exports for the PerMessageDeflate class and utilities for the Sec-WebSocket-Extensions and Sec-WebSocket-Protocol headers (d3503c1f).

8.19.0

Features

• Added the closeTimeout option (#2308).

Bug fixes

• Handled a forthcoming breaking change in Node.js core (19984854).

• 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
• 3ee5349 [api] Convert the isServer and maxPayload parameters to options
• 91707b4 [doc] Add missing space
• 8b55319 [pkg] Update eslint to version 10.0.1
• Additional commits viewable in compare view

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