CVE-2026-85594
Last modified
CVE-2026-85594 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Traefik versions from v3.7.1 fail to enforce crossProviderNamespaces restrictions on the traefik.ingress.kubernetes.io/service.middlewares Service annotation in the Kubernetes Ingress provider. A namespace-limited tenant excluded from the allowlist can attach an operator-owned middleware to its Service, and if that middleware injects backend credentials, recover them at a controlled backend.. EPSS estimates a 0.48% chance of exploitation in the next 30 days.
Description
Traefik versions from v3.7.1 fail to enforce crossProviderNamespaces restrictions on the traefik.ingress.kubernetes.io/service.middlewares Service annotation in the Kubernetes Ingress provider. A namespace-limited tenant excluded from the allowlist can attach an operator-owned middleware to its Service, and if that middleware injects backend credentials, recover them at a controlled backend.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Traefik | Traefik | < 3.7.11 |
References
- https://github.com/traefik/traefik/security/advisories/GHSA-m6wx-622r-48r9Exploit, Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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