جزئیات آسیب‌پذیری

Traefik is an HTTP reverse proxy and load balancer. From version 2.11.9 to 2.11.37 and from version 3.1.3 to 3.6.8, there is a potential vulnerability in Traefik managing the Connection header with X-Forwarded headers. When Traefik processes HTTP/1.1 requests, the protection put in place to prevent the removal of Traefik-managed X-Forwarded headers (such as X-Real-Ip, X-Forwarded-Host, X-Forwarded-Port, etc.) via the Connection header does not handle case sensitivity correctly. The Connection tokens are compared case-sensitively against the protected header names, but the actual header deletion operates case-insensitively. As a result, a remote unauthenticated client can use lowercase Connection tokens (e.g. Connection: x-real-ip) to bypass the protection and trigger the removal of Traefik-managed forwarded identity headers. This issue has been patched in versions 2.11.38 and 3.6.9.

• https://github.com/traefik/traefik/security/advisories/GHSA-92mv-8f8w-wq52 x_refsource_CONFIRM
• https://github.com/traefik/traefik/releases/tag/v2.11.38 x_refsource_MISC
• https://github.com/traefik/traefik/releases/tag/v3.6.9 x_refsource_MISC
• https://access.redhat.com/security/cve/CVE-2026-29054 vdb-entryx_refsource_REDHAT
• https://bugzilla.redhat.com/show_bug.cgi?id=2444872 issue-trackingx_refsource_REDHAT
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-29054.json x_sadp-csaf-vex
• https://access.redhat.com/errata/RHSA-2026:10175 vendor-advisoryx_refsource_REDHAT