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Advisory record · GHSA-7ghq-v6jf-g56c

Traefik: respondingTimeouts.readTimeout is not applied to HTTP/3, leaving slow-body uploads unbounded

CVSS 6.9 MediumEPSS 0.0052 · 44th percentile

Published by the GitHub Advisory Database at 10 Sept 2026, 20:27 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/traefik/traefik/v2Go>=2.8.2, <2.11.562.11.56
github.com/traefik/traefik/v3Go>=3.0.0, <3.7.123.7.12
Identifiers
GHSA-7ghq-v6jf-g56c · CVE-2026-88012 · CVE-2026-88878 · GO-2026-6454
Weakness (CWE)
CWE-770
Tags
Published
10 Sept 2026
Updated
17 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Traefik v2 (>=2.8.2, <2.11.56) and Traefik v3 (>=3.0.0, <3.7.12) do not apply the respondingTimeouts readTimeout setting to HTTP/3 requests, so request bodies sent over HTTP/3 have no time bound. An unauthenticated client can send a slow request body and hold the request and its upstream connection open for as long as it chooses. Upgrade to Traefik v2.11.56 or v3.7.12, which are the fixed versions; no workaround is listed.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.9 Medium 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CNA (VulnCheck)
  • CISA KEV Not listed.
  • EPSS 0.0052, the 44th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 27 Aug 2026, 07:50 UTC Published by the maintainers as a GitHub repository advisory
  2. 31 Oct 2026, 14:13 UTC First seen by agentprime
  3. 31 Oct 2026, 14:13 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.