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CVE-2026-41323

Estado: AnalizadaCrítica (9.1)—

Kyverno is a policy engine designed for cloud native platform engineering teams. Prior to versions 1.18.0-rc1, 1.17.2-rc1, and 1.16.4, Kyverno's apiCall feature in ClusterPolicy automatically attaches the admission controller's ServiceAccount token to outgoing HTTP requests. The service URL has no validation — it can point anywhere, including attacker-controlled servers. Since the admission controller SA has permissions to patch webhook configurations, a stolen token leads to full cluster compromise. Versions 1.18.0-rc1, 1.17.2-rc1, and 1.16.4 patch the issue.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

AV:N/PR:H/AC:L permite T1210 (servicio remoto con privilegios). apiCall sin validación de URL + token de SA = exfiltración de datos (T1005) y SSRF (T1090.004). Token con permisos de webhook = T1556.006 (modificación de MutatingWebhookConfiguration).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Vulnerability ScanningUser Account ManagementThreat Intelligence ProgramSSL/TLS InspectionPrivileged Account ManagementNetwork Segmentation

Tecnologías afectadas (1)

Kyverno — Kyverno

CWE

Referencias

JSON original (NVD)

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