CVE-2025-15566 ingress-nginx auth-proxy-set-headers nginx configuration injection
Attackers can inject nginx configuration via Ingress annotations to execute arbitrary code and read cluster secrets in ingress-nginx.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-15566?
CVE-2025-15566 is a high-severity code injection vulnerability in Kubernetes ingress-nginx, published on 6 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.)
Weakness: CWE-20
Which versions are affected by CVE-2025-15566?
How do I fix CVE-2025-15566?
No fix has been published for CVE-2025-15566 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2025-15566 being exploited?
There is no known exploitation of CVE-2025-15566 in the wild and no public exploit code.
Sources
Also known as GHSA-whpv-427c-7hc3.