Improper input validation in Kubernetes Ingress-Nginx
CVE-2025-15566
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.)
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.005 (38.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Kubernetes Ingress-nginx — versions 0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-15566?
- CVE-2025-15566 is a high-severity vulnerability in Kubernetes Ingress-Nginx, classified under Improper Input Validation. CVSS score: 8.8/10. Published 2026-02-06.
- How severe is CVE-2025-15566?
- High severity. CVSS v3 base score is 8.8 out of 10.