Improper authorization in Ingress-NGINX Controller for Kubernetes - CVE-2026-24513
Published: February 4, 2026
Vulnerability identifier: #VU122288
CSH Severity: Low
CVSS v4: 2.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-24513
CWE-ID: CWE-285
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to bypass authorization checks.
The vulnerability exists due to improper authorization checks where the protection afforded by the auth-url Ingress annotation may not be effective in the presence of a specific misconfiguration. If the ingress-nginx controller is configured with a default custom-errors configuration that includes HTTP errors 401 or 403, and if the configured default custom-errors backend is defective and fails to respect the X-Code HTTP header, then an Ingress with the auth-url annotation may be accessed even when authentication fails.
Affected software
Ingress-NGINX Controller for Kubernetes
How to mitigate CVE-2026-24513
Install updates from vendor's website.
Ingress-NGINX Controller for Kubernetes - addressed in versions 1.13.7, 1.14.3