GHSA-f53h-mxv9-cp98

ingress-nginx comment-based nginx configuration injection

Source: GitHub Advisory Database (reviewed) High CVE-2026-4342

Packages

Ecosystem	Package	Affected	Fixed in
Go	k8s.io/ingress-nginx	< 0.0.0-20260319175635-5183b7d86137	0.0.0-20260319175635-5183b7d86137

Details

As written in the advisory (Markdown source, shown as plain text).

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.)

References

External links from the advisory. They lead to third-party sites.

https://nvd.nist.gov/vuln/detail/CVE-2026-4342 advisory
https://github.com/kubernetes/kubernetes/issues/137893 web
https://github.com/kubernetes/ingress-nginx/commit/5183b7d861377a9a2f6d2acaf44f8f6abd5cd0aa web
https://github.com/kubernetes/ingress-nginx package
http://www.openwall.com/lists/oss-security/2026/03/19/9 web