GO-2026-6201 Traefik: Cross-user response poisoning via proxied CONNECT on Traefik's shared backend keep-alive pool in github.com/traefik/traefik

Traefik: Cross-user response poisoning via proxied CONNECT on Traefik's shared backend keep-alive pool in github.com/traefik/traefik...

HTTP Request Smuggling

Overview Affected versions of this package are vulnerable to HTTP Request Smuggling through the CONNECT handling path and the shared backend transport. An attacker can make another client read attacker-smuggled backend output by sending an HTTP/2 or HTTP/3 CONNECT request with a body that Traefik...

CVE-2026-71324 Traefik: Cross-user response poisoning via proxied CONNECT on Traefik's shared backend keep-alive pool

Traefik is an open source HTTP reverse proxy and load balancer. Prior to 2.11.53, 3.6.24, and 3.7.9, Traefik's default HTTP reverse proxy forwards a plain HTTP/2 or HTTP/3 CONNECT request and its body to an HTTP/1.1 upstream through a shared net/http.Transport. When the upstream answers the CONNE...

EUVD-2026-54288

Traefik is an open source HTTP reverse proxy and load balancer. Prior to 2.11.53, 3.6.24, and 3.7.9, Traefik's default HTTP reverse proxy forwards a plain HTTP/2 or HTTP/3 CONNECT request and its body to an HTTP/1.1 upstream through a shared net/http.Transport. When the upstream answers the CONNE...