CVE-2026-24513 | BDVDB-2026-313607 Detail

Description#

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.

Impact#

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Exploit#

History#

1. Version 12026-02-03Record published in the CVE List.
2. Version 22026-02-18Most recent update recorded in the CVE List.