# CVE-2026-45736: ws: Uninitialized memory disclosure

> CVE-2026-45736: ws: Uninitialized memory disclosure. CVSS 4.4 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-45736
Last updated: 2026-09-11T13:18:11Z

- Published: 2026-05-15 14:53 UTC · Updated: 2026-09-11 13:18 UTC · Assigner: GitHub\_M
- CVSS: 4.4 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N
- EPSS: 0.74%, 54th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-908

## 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.

## Affected vendors and products

- Red Hat: Cryostat 4
- Red Hat: Gatekeeper 3
- Red Hat: OpenShift Lightspeed
- Red Hat: OpenShift Pipelines
- Red Hat: OpenShift Service Mesh 2
- Red Hat: OpenShift Service Mesh 3
- Red Hat: Red Hat AMQ Broker 7.13.6
- Red Hat: Red Hat AMQ Broker 7.14.1
- Red Hat: Red Hat Ansible Automation Platform 2
- Red Hat: Red Hat build of Apache Camel for Spring Boot 4
- Red Hat: Red Hat build of Apache Camel - HawtIO 4
- Red Hat: Red Hat Build of Keycloak
- Red Hat: Red Hat Build of Podman Desktop
- Red Hat: Red Hat Build of Podman Desktop - Tech Preview
- Red Hat: Red Hat Connectivity Link 1
- Red Hat: Red Hat Data Grid 8
- Red Hat: Red Hat Enterprise Linux AI (RHEL AI) 3
- Red Hat: Red Hat Fuse 7
- Red Hat: Red Hat Hardened Images
- Red Hat: Red Hat JBoss Enterprise Application Platform 8
- Red Hat: Red Hat JBoss Enterprise Application Platform Expansion Pack
- Red Hat: Red Hat OpenShift AI (RHOAI)
- Red Hat: Red Hat OpenShift Container Platform 4
- Red Hat: Red Hat OpenShift Virtualization 4
- Red Hat: Red Hat Quay 3
- Red Hat: Red Hat Satellite 6
- Red Hat: Self-service automation portal 2
- websockets: ws

## Tracked companies

- [Bitbucket](https://rewindex.com/company/bitbucket.md)
- [Confluence](https://rewindex.com/company/confluence.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-45736)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-45736)
- [https://github.com/websockets/ws/commit/c0327ec15a54d701eb6ccefaa8bef328cfc03086](https://github.com/websockets/ws/commit/c0327ec15a54d701eb6ccefaa8bef328cfc03086)
- [https://github.com/websockets/ws/security/advisories/GHSA-58qx-3vcg-4xpx](https://github.com/websockets/ws/security/advisories/GHSA-58qx-3vcg-4xpx)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-45736 · Markdown: https://rewindex.com/cve/CVE-2026-45736.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-45736 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:15:49.814Z