Traefik: respondingTimeouts.readTimeout is not applied to HTTP/3, leaving slow-body uploads unbounded

Summary There is a medium severity vulnerability in Traefik's HTTP/3 entry points: the respondingTimeouts settings were not applied to the HTTP/3 request path. readTimeout in particular is on by default at 60s and is documented as bounding the time to read the entire request including its body, b...

CVE-2026-88012 Traefik: respondingTimeouts.readTimeout is not applied to HTTP/3, leaving slow-body uploads unbounded

Traefik is an open source HTTP reverse proxy and load balancer. From 2.8.2 until 2.11.56 and 3.7.12, HTTP/3 entrypoints do not apply entryPoints..transport.respondingTimeouts.readTimeout because the timeout is enforced on a TCP connection and the HTTP/3 server has no corresponding QUIC stream...

CVE-2026-88012

Traefik , the open-source HTTP reverse proxy and load balancer, has a flaw in how HTTP/3 entrypoints handle respondingTimeouts.readTimeout . The timeout is enforced at the TCP layer, but HTTP/3 operates over QUIC , which has no corresponding stream deadline. This means an unauthenticated attacker...