CVE-2026-45736
ws: Uninitialized memory disclosure
4.4
MEDIUM
CVSS 3.1
EPSS 0.01%
Description
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.
How to fix CVE-2026-45736
To remediate CVE-2026-45736, upgrade the affected package to a fixed version below.
- —no fix listed
- —upgrade to 8.20.1 or later
Is CVE-2026-45736 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0
- >= 8.0.0, < 8.20.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.4 | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N |