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's non-canonical write. Versions 2.11.42, 3.6.11, and 3.7.0-ea.3 patch the issue.
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
| Vendor | Product | Versions | |
|---|---|---|---|
| openshift devspaces | 3.27 | — | |
| Red Hat | Red Hat OpenShift Dev Spaces 3.27 | all versions | |
| traefik | traefik | < 2.11.42, >= 3.0.0-beta1, < 3.6.11, >= 3.7.0-ea.1, < 3.7.0-ea.3 |
cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* < 2.11.42cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* ≥ 3.0.0 < 3.6.12cpe:2.3:a:traefik:traefik:3.7.0:ea1:*:*:*:*:*:*cpe:2.3:a:traefik:traefik:3.7.0:ea2:*:*:*:*:*:*Our free, open-source honeypot sensor waits on ports your server does not use and reports the scanners and attackers that connect to a shared blocklist.