CVE-2026-4342
8.8 · HIGHOverview
CVE-2026-4342 is a high-severity vulnerability affecting kubernetes nginx_ingress_controller. It was published on March 19, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical 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.)
Remediation
Check the references section for vendor advisories and patches from kubernetes. Update nginx_ingress_controller to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| kubernetes | nginx_ingress_controller | >= 0, < 1.13.9 | Affected |
Frequently Asked Questions
What is CVE-2026-4342?
CVE-2026-4342 is a high-severity vulnerability affecting kubernetes nginx_ingress_controller. It was published on March 19, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).
How severe is CVE-2026-4342?
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2026-4342?
Check the references section for vendor advisories and patches from kubernetes. Update nginx_ingress_controller to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-4342?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-4342 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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