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CVE-2026-45736

ws: Uninitialized memory disclosure

Published: May 15, 2026Updated: May 19, 2026 Sources: CVE List NVDCWE-908
NVD MITRE
4.4CVSSMEDIUM
EPSS Score
0.5%
Top 62.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:HPR:HUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-908

Affected Products

wswebsockets
Mixed
Web & CMS Plugins / cms-core
wsws project
Library
OSS Libraries / npm
websocketscommercialWeb & CMS Pluginsaka websockets
ws projectpackage-ecosystemOSS Librariesaka ws

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://github.com/websockets/ws/security/advisories/GHSA-58qx-3vcg-4xpx
github.com
https://github.com/websockets/ws/commit/c0327ec15a54d701eb6ccefaa8bef328cfc03086
github.com

Timeline

Published
May 15, 2026
Last Updated
May 19, 2026

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