---
cve: "CVE-2026-24513"
severity: "LOW"
cvss: 3.1
epss: "30%"
vendor: "Kubernetes"
kev: false
exploited: false
published: "2026-02-03 23:16:07"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T04:29:32+02:00"
---

# CVE-2026-24513

> 3.1 LOW · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Keine | good |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- 36800fca611890717cfcbc843a682745a2dfb58a (Commit)
- 451747c70c6fca688e157a8329a3dd219a234fd9 (Commit)

## Referenzen

- <https://github.com/kubernetes/kubernetes/issues/136679>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-24513) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_