CVE-2026-119574

Traefik from 3.2.0 before 3.7.15 contains a data race in the experimental FastProxy that allows unauthenticated attackers to crash the process by abusing HTTP/1 protocol upgrades. Attackers can repeatedly open and abort upgraded connections such as WebSocket, corrupting the unsynchronized shared...

CVE-2026-119574 Traefik 3.2.0 before 3.7.15 FastProxy Data Race Denial of Service

Traefik from 3.2.0 before 3.7.15 contains a data race in the experimental FastProxy that allows unauthenticated attackers to crash the process by abusing HTTP/1 protocol upgrades. Attackers can repeatedly open and abort upgraded connections such as WebSocket, corrupting the unsynchronized shared...

CVE-2026-119574

Traefik versions 3.2.0 before 3.7.15 are vulnerable to a data race within the experimental FastProxy component. This issue allows unauthenticated attackers to crash the process by abusing HTTP/1 protocol upgrades . Specifically, by repeatedly opening and aborting upgraded connections (such as Web...

EUVD-2026-113928

Traefik from 3.2.0 before 3.7.15 contains a data race in the experimental FastProxy that allows unauthenticated attackers to crash the process by abusing HTTP/1 protocol upgrades. Attackers can repeatedly open and abort upgraded connections such as WebSocket, corrupting the unsynchronized shared...

PT-2026-133543

Traefik from 3.2.0 before 3.7.15 contains a data race in the experimental FastProxy that allows unauthenticated attackers to crash the process by abusing HTTP/1 protocol upgrades. Attackers can repeatedly open and abort upgraded connections such as WebSocket, corrupting the unsynchronized shared...