Vulnerability Description
Ocelot through 24.1.0, fixed in commit f156fd4, contains a security control bypass vulnerability that allows denied clients to circumvent IP-based access restrictions by sending WebSocket upgrade requests. The WebSocket upgrade pipeline branch configured via MapWhen in OcelotPipelineExtensions.cs omits SecurityMiddleware, causing requests from blocked IP addresses to be proxied to downstream services without enforcement of the configured allow/block list.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/ThreeMammals/Ocelot/commit/f156fd4017ca25025fffdad8ec56c1d657
- https://github.com/ThreeMammals/Ocelot/issues/2403
- https://github.com/ThreeMammals/Ocelot/pull/2406
- https://www.vulncheck.com/advisories/ocelot-ip-allow-block-list-bypass-for-webso
FAQ
What is CVE-2026-58172?
CVE-2026-58172 is a vulnerability with a CVSS score of 9.1 (CRITICAL). Ocelot through 24.1.0, fixed in commit f156fd4, contains a security control bypass vulnerability that allows denied clients to circumvent IP-based access restrictions by sending WebSocket upgrade requ...
How severe is CVE-2026-58172?
CVE-2026-58172 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-58172?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.