PT-2026-26428 · Kubernetes+1 · Ingress-Nginx+1

Wooseokdotkim

·

Published

2026-03-19

·

Updated

2026-03-20

·

CVE-2026-4342

CVSS v3.1

8.8

High

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
ingress-nginx comment-based nginx configuration injection
CVE: CVE-2026-4342 Vendor: Kubernetes Product: ingress-nginx CVSS: 8.8 Credits: wooseokdotkim
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.)
References: • https://t.co/VKWL6aiMlP • https://t.co/L2BF9eIPqL
#dbugs vuln

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2026-4342
GHSA-F53H-MXV9-CP98

Affected Products

Ingress-Nginx
K8S.Io/Ingress-Nginx