CVE-2026-4342

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-4342
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.)

8.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/kubernetes/kubernetes/issues/137893 Issue Tracking
http://www.openwall.com/lists/oss-security/2026/03/19/9 Mailing List Third Party Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:kubernetes:nginx_ingress_controller:*:*:*:*:*:*:*:*
cpe:2.3:a:kubernetes:nginx_ingress_controller:*:*:*:*:*:*:*:*
cpe:2.3:a:kubernetes:nginx_ingress_controller:1.15.0:*:*:*:*:*:*:*
History

19 May 2026, 22:16

Type Values Removed Values Added
First Time Kubernetes nginx Ingress Controller
CPE cpe:2.3:a:kubernetes:ingress-nginx:*:*:*:*:*:*:*:*
cpe:2.3:a:kubernetes:ingress-nginx:1.15.0:*:*:*:*:*:*:*		 cpe:2.3:a:kubernetes:nginx_ingress_controller:1.15.0:*:*:*:*:*:*:*
cpe:2.3:a:kubernetes:nginx_ingress_controller:*:*:*:*:*:*:*:*

28 Apr 2026, 21:56

Type Values Removed Values Added
References () https://github.com/kubernetes/kubernetes/issues/137893 - () https://github.com/kubernetes/kubernetes/issues/137893 - Issue Tracking
References () http://www.openwall.com/lists/oss-security/2026/03/19/9 - () http://www.openwall.com/lists/oss-security/2026/03/19/9 - Mailing List, Third Party Advisory
CWE NVD-CWE-noinfo
Summary
  • (es) Se descubrió un problema de seguridad en ingress-nginx donde una combinación de anotaciones de Ingress puede utilizarse para inyectar configuración en nginx. Esto puede conducir a la ejecución de código arbitrario en el contexto del controlador ingress-nginx, y a la divulgación de Secrets accesibles para el controlador. (Tenga en cuenta que en la instalación predeterminada, el controlador puede acceder a todos los Secrets a nivel de clúster.)
CPE cpe:2.3:a:kubernetes:ingress-nginx:1.15.0:*:*:*:*:*:*:*
cpe:2.3:a:kubernetes:ingress-nginx:*:*:*:*:*:*:*:*
First Time Kubernetes ingress-nginx
Kubernetes

19 Mar 2026, 22:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-03-19 22:16

Updated : 2026-05-19 22:16

NVD link : CVE-2026-4342

Mitre link : CVE-2026-4342

CVE.ORG link : CVE-2026-4342

JSON object : View

Products Affected

kubernetes

  • nginx_ingress_controller
CWE
CWE-20

Improper Input Validation

NVD-CWE-noinfo