Vulnerability · Published Mar 9, 2026 · Assigned by kubernetes
CVE-2026-3288ingress-nginx rewrite-target nginx configuration injection
High 8.8
In plain English
A high-severity improper input validation in ingress-nginx from Kubernetes. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 7.0% (higher than 94% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official description
A security issue was discovered in ingress-nginx where the `nginx.ingress.kubernetes.io/rewrite-target` 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 products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Kubernetes | ingress-nginx | 0 – before 1.13.80 – before 1.14.40 – before 1.15.0 |
Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H