CyberRota Analysis
AI-GeneratedTraefik's BasicAuth, DigestAuth, and ForwardAuth middlewares are vulnerable to header spoofing due to improper handling of underscore-variant header names, allowing attackers to inject malicious headers that can bypass authentication and reach backend services. This critical vulnerability poses a significant risk to any organization using affected versions of Traefik, particularly those with protected routes, and should be prioritized for immediate remediation. Users should upgrade to versions v2.11.51, v3.6.22, or v3.7.6 to mitigate this risk.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
Traefik is an HTTP reverse proxy and load balancer. Prior to v2.11.51, v3.6.22, and v3.7.6, Traefik's BasicAuth, DigestAuth, and ForwardAuth middlewares strip canonical-cased spoofed identity headers before writing Traefik's own value, but do not account for underscore-variant header names, which many backends normalize identically to dashed forms. An attacker able to reach a protected route can inject an underscore-variant header that survives Traefik's stripping and reaches the backend alongside, or on the unauthenticated ForwardAuth authResponseHeaders path instead of, the value Traefik intended to set, spoofing identity or authorization context. This issue is fixed in versions v2.11.51, v3.6.22, and v3.7.6.
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