CyberRota Analysis
AI-GeneratedTraefik versions 2.11.26 to 2.11.57 and 3.7.13 are vulnerable due to improper handling of the Connection header, which can allow unauthenticated requests to bypass security measures and access protected backend paths when the backend accepts h2c connections. This vulnerability poses a significant risk to environments relying on Traefik for secure traffic management. Organizations using affected versions should prioritize upgrading to the patched releases (2.11.57 or 3.7.13) to mitigate potential exploitation.
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 open source HTTP reverse proxy and load balancer. From 2.11.26 until 2.11.57 and 3.7.13, Traefik forwards a client-supplied Connection header requesting Upgrade, the Upgrade: h2c token, and HTTP2-Settings to a shared backend. If the backend accepts h2c and returns 101 Switching Protocols, Traefik enters a raw tunnel and no longer applies routers, BasicAuth, ForwardAuth, IPAllowList, RateLimit, access logging, metrics, or tracing to later HTTP/2 requests, allowing an unauthenticated request through an unprotected route to reach protected paths on the same backend. This issue is fixed in 2.11.57 and 3.7.13.
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