CVE-2025-15566: ingress-nginx auth-proxy-set-headers nginx configuration injection
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 Software
Event History
Frequently Asked Questions
What is the severity of CVE-2025-15566?
CVE-2025-15566 has a high severity rating due to the potential for arbitrary code execution.
How do I fix CVE-2025-15566?
To fix CVE-2025-15566, update your ingress-nginx configuration to restrict the use of the auth-proxy-set-headers annotation.
What software is affected by CVE-2025-15566?
CVE-2025-15566 affects the ingress-nginx component used in Kubernetes.
Can CVE-2025-15566 lead to data breaches?
Yes, CVE-2025-15566 could potentially lead to data breaches due to arbitrary code execution capabilities.
How can I mitigate CVE-2025-15566 if I cannot update immediately?
You can mitigate CVE-2025-15566 by disabling the use of the auth-proxy-set-headers annotation in your ingress resources.