PT-2026-41307 · Websocket · Ws

Published 2026-05-15 · Updated 2026-05-15 · CVE-2026-45736

Mitre

CVSS v3.1

4.4

Medium

Base vector

AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N

ws is an open source WebSocket client and server for Node.js. Prior to 8.20.1, the websocket.close() implementation is vulnerable to uninitialized memory disclosure when a TypedArray is passed as the reason argument. This vulnerability is fixed in 8.20.1.

Fix

Use of Uninitialized Resource

Weakness Enumeration

CWE-908

Related Identifiers

CVE-2026-45736

Affected Products

Ws

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-45736 · Security Note
• https://github.com/websockets/ws/security/advisories/GHSA-58qx-3vcg-4xpx · Note
• https://github.com/websockets/ws/commit/c0327ec15a54d701eb6ccefaa8bef328cfc03086 · Note