https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Tue, 29 Sep 2026 09:32:29 +0000 https://vulnerability.circl.lu/vuln/cve-2026-33433 <p><strong>Affected:</strong> traefik, Red Hat OpenShift Dev Spaces 3.27</p> <p>Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.42, 3.6.11, and 3.7.0-ea.3, when `headerField` is configured with a non-canonical HTTP header name (e.g., `x-auth-user` instead of `X-Auth-User`), an authenticated attacker can inject their own canonical version of that header to impersonate any identity to the backend. The backend receives two header entries — the attacker-injected canonical one is read first, overriding Traefik&#39;s non-canonical write. Versions 2.11.42, 3.6.11, and 3.7.0-ea.3 patch the issue.</p> <p><strong>Affected:</strong> traefik, Red Hat OpenShift Dev Spaces 3.27</p> <p>Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.42, 3.6.11, and 3.7.0-ea.3, when `headerField` is configured with a non-canonical HTTP header name (e.g., `x-auth-user` instead of `X-Auth-User`), an authenticated attacker can inject their own canonical version of that header to impersonate any identity to the backend. The backend receives two header entries — the attacker-injected canonical one is read first, overriding Traefik&#39;s non-canonical write. Versions 2.11.42, 3.6.11, and 3.7.0-ea.3 patch the issue.</p> https://vulnerability.circl.lu/vuln/cve-2026-33433