Resource exhaustion in Traefik
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 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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.005 (43.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Traefik — versions >= 2.8.2, < 2.11.56, >= 3.0.0, < 3.7.12
Weakness classification (CWE)
References
- github.com/traefik/traefik/security/advisories/GHSA-7ghq-v6jf-g56c (Patch, Vendor Advisory)
- github.com/traefik/traefik/pull/13717 (Patch, Issue Tracking)
- github.com/traefik/traefik/commit/a8d0bc425859dde7481a6c9a324e610b81d754d0 (Patch)
- github.com/traefik/traefik/releases/tag/v2.11.56 (Patch, Release Notes)
- github.com/traefik/traefik/releases/tag/v3.7.12 (Patch, Release Notes)
Frequently asked questions
- What is CVE-2026-88012?
- CVE-2026-88012 is a medium-severity vulnerability in Traefik, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.3/10. Published 2026-09-10.
- How severe is CVE-2026-88012?
- Medium severity. CVSS v3 base score is 5.3 out of 10.