CVE-2026-25949

A flaw was found in Traefik, an HTTP reverse proxy and load balancer. An unauthenticated client can exploit this vulnerability by sending a specific 8-byte Postgres SSLRequest STARTTLS prelude and then intentionally delaying further communication. This action bypasses Traefik's configured read...

CVE-2026-25949 Traefik: TCP readTimeout bypass via STARTTLS on Postgres

Traefik is an HTTP reverse proxy and load balancer. Prior to 3.6.8, there is a potential vulnerability in Traefik managing STARTTLS requests. An unauthenticated client can bypass Traefik entrypoint respondingTimeouts.readTimeout by sending the 8-byte Postgres SSLRequest STARTTLS prelude and then...

GHSA-89P3-4642-CR2W Traefik: TCP readTimeout bypass via STARTTLS on Postgres

Impact There is a potential vulnerability in Traefik managing STARTTLS requests. An unauthenticated client can bypass Traefik entrypoint respondingTimeouts.readTimeout by sending the 8-byte Postgres SSLRequest STARTTLS prelude and then stalling, causing connections to remain open indefinitely,...