CVE-2026-4342
High
Description
A security issue was discovered in ingress-nginx where a combination of Ingress annotations 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.)
SeverityHigh
CVSS8.8
Exploit probability—
ProductKubernetes Nginx Ingress Controller
PublishedMar 19, 2026
First seenMar 19, 2026
Weakness typeCWE-20Improper input validation
How to fix
Update
- kubernetes nginx_ingress_controller1.13.9, 1.14.5 or later
- k8s.io/ingress-nginx0.0.0-20260319175635-5183b7d86137 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| kubernetes nginx_ingress_controller | v < 1.13.9, 1.14.0 ≤ v < 1.14.5, 1.15.0 | 1.13.9, 1.14.5 |
| k8s.io/ingress-nginxGo | v < 0.0.0-20260319175635-5183b7d86137 | 0.0.0-20260319175635-5183b7d86137 |
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