CVE-2026-24513
ingress-nginx auth-url protection bypass
A security issue was discovered in ingress-nginx 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. Note that the built-in custom-errors backend works correctly. To trigger this issue requires an administrator to specifically configure ingress-nginx with a broken external component.
| CWE | CWE-754 |
| Vendor | kubernetes |
| Product | ingress-nginx |
| Ecosystems | |
| Industries | Technology |
| Published | Feb 3, 2026 |
| Last Updated | Feb 18, 2026 |
Get instant alerts for kubernetes ingress-nginx
Be the first to know when new low vulnerabilities affecting kubernetes ingress-nginx are published — delivered to Slack, Telegram or Discord.
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N