CVE-2026-32695
Last modified
CVE-2026-32695 is a high-severity vulnerability rated 7.7/10 on the CVSS scale. Traefik is an HTTP reverse proxy and load balancer. Prior to versions 3.6.11 and 3.7.0-ea.2, Traefik's Knative provider builds router rules by interpolating user-controlled values into backtick-delimited rule expressions without escaping. EPSS estimates a 0.46% chance of exploitation in the next 30 days.
Description
Traefik is an HTTP reverse proxy and load balancer. Prior to versions 3.6.11 and 3.7.0-ea.2, Traefik's Knative provider builds router rules by interpolating user-controlled values into backtick-delimited rule expressions without escaping. In live cluster validation, Knative `rules[].hosts[]` was exploitable for host restriction bypass (for example `tenant.example.com`) || Host(`attacker.com`), producing a router that serves attacker-controlled hosts. Knative `headers[].exact` also allows rule-syntax injection and proves unsafe rule construction. In multi-tenant clusters, this can route unauthorized traffic to victim services and lead to cross-tenant traffic exposure. Versions 3.6.11 and 3.7.0-ea.2 patch the issue.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Traefik | Traefik | < 3.6.11 | — |
| Traefik | Traefik | 3.7.0 | Ea1 |
References
- https://github.com/traefik/traefik/releases/tag/v3.6.11Product, Release Notes
- https://github.com/traefik/traefik/releases/tag/v3.7.0-ea.2Product, Release Notes
- https://github.com/traefik/traefik/security/advisories/GHSA-67jx-r9pv-98rjExploit, Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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