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CVE PROGRAM SOURCE RECORD9.3 Critical

CVE-2026-58172

Ocelot - IP Allow/Block List Bypass for WebSocket Upgrade Requests

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

ThreeMammals Ocelot

Default version status: unaffected

  • 0 to ≤ 24.1.0affected
  • f156fd4017ca25025fffdad8ec56c1d657dfb402unaffected
pkg:github/ThreeMammals/Ocelot

References