Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Traefik versions below 3.6.10 are vulnerable, and the Kubernetes Gateway provider may be affected (older github.com/traefik/traefik and v2 entries list no fixed version). A tenant with write access to an HTTPRoute can use unescaped backticks in header or query match values to inject rule tokens, which may bypass listener hostname constraints and redirect traffic for other hostnames to attacker-controlled backends. Upgrade to Traefik v3.6.10 or later; for the older module paths, no fix is listed.
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
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 6.1 | Medium | 4.0 | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0031, the 24th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 11 Mar 2026, 11:29 UTC Published by the maintainers as a GitHub repository advisory
- 31 Oct 2026, 14:14 UTC First seen by agentprime
- 31 Oct 2026, 14:14 UTC Confirmed by OSV