Code Injection in Ingress-NGINX Controller for Kubernetes - CVE-2026-3288
Published: March 11, 2026
Vulnerability identifier: #VU123877
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N]
CVE-ID: CVE-2026-3288
CWE-ID: CWE-94
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary code on the target system.
The vulnerability exists due to improper input validation where the "nginx.ingress.kubernetes.io/rewrite-target" Ingress annotation can be used to inject configuration into nginx. A remote user can inject and execute arbitrary code in the context of the ingress-nginx controller.
Affected software
Ingress-NGINX Controller for Kubernetes
Communications Unified Assurance
Communications Unified Assurance
How to mitigate CVE-2026-3288
Install updates from vendor's website.
Ingress-NGINX Controller for Kubernetes - addressed in versions 1.13.8, 1.14.4