CVE-2026-1580 ingress-nginx auth-method nginx configuration injection
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-2026-1580?
CVE-2026-1580 is a high-severity code injection vulnerability in Kubernetes ingress-nginx, published on 3 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-method` 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-2026-1580?
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 | 1.13.7 |
k8s.io/ingress-nginx Go | All versions | 1.13.7 |
k8s.io/ingress-nginx Go | From 1.14.0 | 1.14.3 |
k8s.io/ingress-nginx Go | From 1.14.0 | 1.14.3 |
How do I fix CVE-2026-1580?
Upgrade k8s.io/ingress-nginx to a fixed version for your release line: 1.13.7 or 1.14.3.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-1580 being exploited?
There is no known exploitation of CVE-2026-1580 in the wild and no public exploit code.
Sources
Also known as GHSA-9h3p-52vh-959w, GO-2026-4423, MINI-2g88-hrrr-p4gr, MINI-43mc-757j-h37r, MINI-47wf-hwwf-5p9g, MINI-5wx8-rj68-wvmf and 6 more.