CVE-2026-88012Traefik: respondingTimeouts.readTimeout is not applied to HTTP/3, leaving slow-body uploads unbounded
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Weakness (CWE)
- CWE-770
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Sep 11, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
traefik traefik traefik:traefik (from the name) | from 2.8.2, < 2.11.56; from 3.0.0, < 3.7.12 | CNA record |
traefik traefik traefik:traefik | from 2.8.2 before 2.11.56; from 3.0.0 before 3.7.12 | NVD |
References
- https://github.com/traefik/traefik/security/advisories/GHSA-7ghq-v6jf-g56cx-refsource-confirm, patch, vendor-advisory
- https://github.com/traefik/traefik/pull/13717x-refsource-misc, issue-tracking, patch
- https://github.com/traefik/traefik/commit/a8d0bc425859dde7481a6c9a324e610b81d754d0x-refsource-misc, patch
- https://github.com/traefik/traefik/releases/tag/v2.11.56x-refsource-misc, patch, release-notes
- https://github.com/traefik/traefik/releases/tag/v3.7.12x-refsource-misc, patch, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.