medium5.3
CVE-2026-88012
Traefik: respondingTimeouts.readTimeout is not applied to HTTP/3, leaving slow-body uploads unbounded
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/traefik/traefik/v2 | >= 2.8.2, < 2.11.56 | 2.11.56 |
| go | github.com/traefik/traefik/v3 | >= 3.0.0, < 3.7.12 | 3.7.12 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Traefik | Traefik | from 2.8.2 before 2.11.56 from 3.0.0 before 3.7.12 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-7ghq-v6jf-g56c
- https://github.com/traefik/traefik/security/advisories/GHSA-7ghq-v6jf-g56c
- https://nvd.nist.gov/vuln/detail/CVE-2026-88012
- https://github.com/traefik/traefik/pull/13717
- https://github.com/traefik/traefik/commit/a8d0bc425859dde7481a6c9a324e610b81d754d0
- https://github.com/traefik/traefik/releases/tag/v2.11.56
- https://github.com/traefik/traefik/releases/tag/v3.7.12