CVE-2026-88012
Traefik: respondingTimeouts.readTimeout is not applied to HTTP/3, leaving slow-body uploads unbounded
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-770 |
| Vendor | traefik |
| Product | traefik |
| Published | Sep 10, 2026 |
| Last Updated | Sep 11, 2026 |
Stay Ahead of the Next One
Get instant alerts for traefik traefik
Be the first to know when new medium vulnerabilities affecting traefik traefik are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
traefik / traefik
>= 2.8.2, < 2.11.56 >= 3.0.0, < 3.7.12
References
github.com: https://github.com/traefik/traefik/security/advisories/GHSA-7ghq-v6jf-g56c github.com: https://github.com/traefik/traefik/pull/13717 github.com: https://github.com/traefik/traefik/commit/a8d0bc425859dde7481a6c9a324e610b81d754d0 github.com: https://github.com/traefik/traefik/releases/tag/v2.11.56 github.com: https://github.com/traefik/traefik/releases/tag/v3.7.12