CVE-2026-45736

ws: Uninitialized memory disclosure

Published May 15, 2026 CVSS 3.1 · 4.4 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-58qx-3vcg-4xpx ws: Uninitialized memory disclosure
References
Link Providers
https://access.redhat.com/errata/RHSA-2026:26638 cve-icon
https://access.redhat.com/errata/RHSA-2026:26994 cve-icon
https://access.redhat.com/errata/RHSA-2026:27171 cve-icon
https://access.redhat.com/errata/RHSA-2026:29197 cve-icon
https://access.redhat.com/errata/RHSA-2026:33574 cve-icon
https://access.redhat.com/errata/RHSA-2026:34374 cve-icon
https://access.redhat.com/errata/RHSA-2026:36754 cve-icon
https://access.redhat.com/errata/RHSA-2026:36820 cve-icon
https://access.redhat.com/errata/RHSA-2026:37272 cve-icon
https://access.redhat.com/errata/RHSA-2026:40768 cve-icon
https://access.redhat.com/errata/RHSA-2026:40792 cve-icon
https://access.redhat.com/errata/RHSA-2026:41928 cve-icon
https://access.redhat.com/errata/RHSA-2026:44235 cve-icon
https://access.redhat.com/errata/RHSA-2026:44263 cve-icon
https://access.redhat.com/errata/RHSA-2026:44267 cve-icon
https://access.redhat.com/errata/RHSA-2026:48151 cve-icon
https://access.redhat.com/errata/RHSA-2026:48693 cve-icon
https://access.redhat.com/errata/RHSA-2026:56366 cve-icon
https://access.redhat.com/errata/RHSA-2026:56431 cve-icon
https://access.redhat.com/errata/RHSA-2026:56928 cve-icon
https://access.redhat.com/errata/RHSA-2026:57013 cve-icon
https://access.redhat.com/errata/RHSA-2026:57590 cve-icon
https://access.redhat.com/errata/RHSA-2026:60520 cve-icon
https://access.redhat.com/errata/RHSA-2026:65126 cve-icon
https://access.redhat.com/errata/RHSA-2026:66488 cve-icon
https://access.redhat.com/errata/RHSA-2026:66545 cve-icon
https://access.redhat.com/errata/RHSA-2026:7655 cve-icon
https://access.redhat.com/security/cve/CVE-2026-45736 cve-icon
https://bugzilla.redhat.com/show_bug.cgi?id=2477914 cve-icon
https://github.com/websockets/ws/commit/c0327ec15a54d701eb6ccefaa8bef328cfc03086 cve-icon cve-icon
https://github.com/websockets/ws/security/advisories/GHSA-58qx-3vcg-4xpx cve-icon cve-icon cve-icon
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45736.json cve-icon
History
Type Values Removed Values Added
First Time appeared Ws Project
Ws Project ws
CPEs cpe:2.3:a:ws_project:ws:*:*:*:*:*:node.js:*:*
Vendors & Products Ws Project
Ws Project ws
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Websockets
Websockets ws
Vendors & Products Websockets
Websockets ws
Type Values Removed Values Added
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.
Title ws: Uninitialized memory disclosure
Weaknesses CWE-908
References
Metrics cvssV3_1

{'score': 4.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Sep 11, 2026, 12:09 PM
Reserved
May 13, 2026, 6:54 AM
Status
Modified
Published
May 15, 2026, 3:16 PM
Modified
Oct 26, 2026, 2:10 PM