Resource Exhaustion The advisory has been revoked - it doesn't affect any version of package ws.src (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL10-WSSRC-14926485
- published14 Jan 2026
- disclosed25 May 2021
Introduced: 25 May 2021
CVE-2021-32640 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream ws.src package and not the ws.src package as distributed by RHEL.
ws is an open source WebSocket client and server library for Node.js. A specially crafted value of the Sec-Websocket-Protocol header can be used to significantly slow down a ws server. The vulnerability has been fixed in ws@7.4.6 (https://github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff). In vulnerable versions of ws, the issue can be mitigated by reducing the maximum allowed length of the request headers using the --max-http-header-size=size and/or the maxHeaderSize options.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1965488
- https://access.redhat.com/security/cve/CVE-2021-32640
- https://lists.apache.org/thread.html/rdfa7b6253c4d6271e31566ecd5f30b7ce1b8fb2c89d52b8c4e0f4e30@%3Ccommits.tinkerpop.apache.org%3E
- https://github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff
- https://github.com/websockets/ws/security/advisories/GHSA-6fc8-4gx4-v693
- https://lists.apache.org/thread.html/rdfa7b6253c4d6271e31566ecd5f30b7ce1b8fb2c89d52b8c4e0f4e30%40%3Ccommits.tinkerpop.apache.org%3E
- https://security.netapp.com/advisory/ntap-20210706-0005/