# CVE-2026-48779: ws: Memory exhaustion DoS from tiny fragments and data chunks

> CVE-2026-48779: ws: Memory exhaustion DoS from tiny fragments and data chunks. CVSS 7.5 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-48779
Last updated: 2026-09-11T13:18:14Z

- Published: 2026-06-16 21:26 UTC · Updated: 2026-09-11 13:18 UTC · Assigner: GitHub\_M
- CVSS: 7.5 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS: 0.81%, 57th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-400, CWE-770

## Description

ws is an open source WebSocket client and server for Node.js. All versions from 1.1.0 up to (but not including) 5.2.5, from 6.0.0 up to 6.2.4, from 7.0.0 up to 7.5.11, and from 8.0.0 up to 8.21.0 are affected by a memory exhaustion DoS vulnerability. A peer can send a high volume of exceptionally small fragments and data chunks, with modest network traffic, to force the remote peer into allocating and holding structural wrappers that consume far more memory than the default documented message-size limit, leading to process termination due to OOM. This issue has been fixed in versions 5.2.5, 6.2.4, 7.5.11, and 8.21.0.

## Affected vendors and products

- Red Hat: Cryostat 4
- Red Hat: Gatekeeper 3
- Red Hat: OpenShift Lightspeed
- Red Hat: OpenShift Pipelines
- 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-2026-48779)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-48779)
- [https://github.com/websockets/ws/commit/86d3e8a5fb0246ed373860c5fbb0de88824a27f7](https://github.com/websockets/ws/commit/86d3e8a5fb0246ed373860c5fbb0de88824a27f7)
- [https://github.com/websockets/ws/commit/b5372ac67bb97a773727b8e9f5035a8123556d53](https://github.com/websockets/ws/commit/b5372ac67bb97a773727b8e9f5035a8123556d53)
- [https://github.com/websockets/ws/commit/bca91adf15677e47dbe4f959653452727be28b94](https://github.com/websockets/ws/commit/bca91adf15677e47dbe4f959653452727be28b94)
- [https://github.com/websockets/ws/commit/fd36cd864fcdf62a08273a99e19a7d975401fee8](https://github.com/websockets/ws/commit/fd36cd864fcdf62a08273a99e19a7d975401fee8)
- [https://github.com/websockets/ws/security/advisories/GHSA-96hv-2xvq-fx4p](https://github.com/websockets/ws/security/advisories/GHSA-96hv-2xvq-fx4p)

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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-2026-48779 · Markdown: https://rewindex.com/cve/CVE-2026-48779.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-48779 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:09:26.884Z