Vulnerability 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.)
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Kubernetes | Nginx Ingress Controller | < 1.13.9 |
Related Weaknesses (CWE)
References
- https://github.com/kubernetes/kubernetes/issues/137893Issue Tracking
- http://www.openwall.com/lists/oss-security/2026/03/19/9Mailing ListThird Party Advisory
FAQ
What is CVE-2026-4342?
CVE-2026-4342 is a vulnerability with a CVSS score of 8.8 (HIGH). 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 ...
How severe is CVE-2026-4342?
CVE-2026-4342 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-4342?
Check the references section above for vendor advisories and patch information. Affected products include: Kubernetes Nginx Ingress Controller.