CVE-2025-1097 ingress-nginx controller - configuration injection via unsanitized auth-tls-match-cn annotation
Attackers can inject nginx configuration via 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
- Available
What is CVE-2025-1097?
CVE-2025-1097 is a high-severity code injection vulnerability in kubernetes ingress-nginx, published on 24 Mar 2025. 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 https://github.com/kubernetes/ingress-nginx where the `auth-tls-match-cn` 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-2025-1097?
5 open source packages ship an affected version, including k8s.io/ingress-nginx.
| Package | Affected | Fixed in |
|---|---|---|
k8s.io/ingress-nginx Go | All versions | None |
k8s.io/ingress-nginx Go | All versions | 1.11.5 |
k8s.io/ingress-nginx Go | All versions | 1.11.5 |
k8s.io/ingress-nginx Go | From 1.12.0-beta.0 | 1.12.1 |
k8s.io/ingress-nginx Go | From 1.12.0-beta.0 | 1.12.1 |
How do I fix CVE-2025-1097?
Upgrade k8s.io/ingress-nginx to a fixed version for your release line: 1.11.5 or 1.12.1.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2025-1097 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-1097 exists.
Public exploit code: 1 Exploit-DB entry, 1 Nuclei template and 2 proofs of concept on GitHub.
Sources
Also known as GHSA-823x-fv5p-h7hw, GO-2025-3565, MINI-45p2-p5rg-8m87, MINI-69mc-p3wc-qx7v, MINI-89f9-gcxp-3fg6, MINI-fcj4-p9c9-8fp8 and 6 more.