CVE-2026-88012: 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…

PriorityP427medium5.3CVSS 3.1

AVNACLPRNUINSUCNINAL

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 deadline. An unauthenticated client can use a slow request body, trickling data indefinitely while holding a request and an upstream connection open and exhausting backends with bounded connection pools. This issue is fixed in 2.11.56 and 3.7.12.

Affected

4 ranges

Vendor	Product	Version range	Fixed in
github.com	traefik_traefik_v2	>= 2.8.2 < 2.11.56	2.11.56
github.com	traefik_traefik_v3	>= 3.0.0 < 3.7.12	3.7.12
traefik	traefik	—	—
traefik	traefik	—	—

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