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 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.
beschreibt (1)
Zugehörige CVEs.
| ID | Schweregrad | ausnutzbar | ||
|---|---|---|---|---|
| CVE-2026-88878US | — | — | ||
Traefik is an HTTP reverse proxy and load balancer. In versions >= v2.8.2 through <= v2.11.55 and >= v3.0.0 through <= v3.7.11, the entryPoints.<name>.transport.respondingTimeouts… | ||||
Referenzen
Externe Belege — Patches, Meldungen, Analysen.
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88012.jsonADVISORY
- https://github.com/traefik/traefik/commit/a8d0bc425859dde7481a6c9a324e610b81d754d0FIX
- https://github.com/traefik/traefik/pull/13717FIX
- https://github.com/traefik/traefik/releases/tag/v2.11.56WEB
- https://github.com/traefik/traefik/releases/tag/v3.7.12WEB
- https://github.com/traefik/traefik/security/advisories/GHSA-7ghq-v6jf-g56cADVISORY
- https://nvd.nist.gov/vuln/detail/CVE-2026-88012ADVISORY
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