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CVE-2026-27803

Estado: AnalizadaAlta (8.3)—

Vaultwarden is an unofficial Bitwarden compatible server written in Rust, formerly known as bitwarden_rs. Prior to version 1.35.4, when a Manager has manage=false for a given collection, they can still perform several management operations as long as they have access to the collection. This issue has been patched in version 1.35.4.

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.

Acceso de red con autenticación (PR:L) en servidor remoto Vaultwarden; Manager elude restricciones de permisos (CWE-269, CWE-285, CWE-863) para escalar privilegios dentro de colecciones y abusar de credenciales/cuentas.

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

Threat Intelligence ProgramPrivileged Account ManagementApplication Isolation and SandboxingExploit ProtectionUpdate SoftwareApplication Developer Guidance

Tecnologías afectadas (1)

Dani-garcia — Vaultwarden

CWE

Referencias

JSON original (NVD)

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          "role": "CISA Coordinator",
          "options": [
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            },
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          "privilegesRequired": "LOW",
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            }
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    }
  ],
  "lastModified": "2026-06-17T10:27:42.650",
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