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CVE-2026-34475

Estado: AnalizadaCrítica (9.8)—

Varnish Cache before 8.0.1 and Varnish Enterprise before 6.0.16r12, in certain unchecked req.url scenarios, mishandle URLs with a path of / for HTTP/1.1, potentially leading to cache poisoning or authentication bypass.

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.

Vector AV:N/AC:L/PR:N indica red sin autenticación (T1190). Cache poisoning es T1565.001; el bypass de autenticación correlaciona con T1556.004 (modificación de lógica de autorización) y potencial acceso no autorizado (T1078.001).

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

Privileged Account ManagementMulti-factor AuthenticationVulnerability ScanningRestrict File and Directory PermissionsPassword PoliciesRemote Data Storage

Tecnologías afectadas (2)

Varnish-software — Varnish EnterpriseVinyl-cache — Vinyl Cache

CWE

Referencias

JSON original (NVD)

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