Vulnerability 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.)
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Kubernetes | Ingress-Nginx | < 1.13.8 |
Related Weaknesses (CWE)
References
- https://github.com/kubernetes/kubernetes/issues/137560Issue TrackingThird Party Advisory
- http://www.openwall.com/lists/oss-security/2026/03/09/8Mailing ListThird Party Advisory
- https://github.com/bvabhishek/CVE-2026-3288-labMitigationThird Party Advisory
FAQ
What is CVE-2026-3288?
CVE-2026-3288 is a vulnerability with a CVSS score of 8.8 (HIGH). 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 co...
How severe is CVE-2026-3288?
CVE-2026-3288 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-2026-3288?
Check the references section above for vendor advisories and patch information. Affected products include: Kubernetes Ingress-Nginx.