CVE-2026-45736 MEDIUM

CVE-2026-45736: ws: Uninitialized memory disclosure

Vendor Websockets
Product ws
Weakness CWE-908
Published May 15, 2026
Last update June 30, 2026
View on NVD All CVEs

CVSS base score

4.4/10
Attack vector Network
Attack complexity High
Privileges required High
User interaction None
Confidentiality High
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 15, 2026 CVE published
June 30, 2026 Record updated