CVE-2025-15566: Kubernetes Ingress-Nginx

High severity, CVSS 8.8. EPSS: 0.5% chance of exploitation in the next 30 days.

A security issue was discovered in ingress-nginx where the `nginx.ingress.kubernetes.io/auth-proxy-set-headers` Ingress annotation can be used to inject configuration into nginx. This can lead to arbitrary code execution in the context of the ingress-nginx controller, and disclosure of Secrets accessible to the controller. (Note that in the default installation, the controller can access all Secrets cluster-wide.)

Affected products

• Kubernetes Ingress-Nginx: before 1.12.5 (fixed in 1.12.5); before 1.13.1 (fixed in 1.13.1)

Published 2026-02-06. Last modified 2026-06-17.