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CVE-2026-23989

Estado: AnalizadaAlta (8.1)—

REVA is an interoperability platform. Prior to 2.42.3 and 2.40.3, a bug in the GRPC authorization middleware of the "Reva" component of OpenCloud allows a malicious user to bypass the scope verification of a public link. By exploiting this via the the "archiver" service this can be leveraged to create an archive (zip or tar-file) containing all resources that this creator of the public link has access to. This vulnerability is fixed in 2.42.3 and 2.40.3.

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 remoto a servicio GRPC (red) con PR:L y bypass de autorización. Permite acceso como otro usuario (T1078) y exfiltración de recursos (T1005) vía archiver.

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 ManagementApplication Developer GuidanceActive Directory ConfigurationVulnerability ScanningUser TrainingUser Account Management

Tecnologías afectadas (1)

Heinlein — Opencloud Reva

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2026-23989",
  "cveTags": [],
  "metrics": {
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          "id": "CVE-2026-23989",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
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              "automatable": "yes"
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              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2026-02-06T18:51:52.147279Z"
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "value": "REVA is an interoperability platform. Prior to 2.42.3 and 2.40.3, a bug in the GRPC authorization middleware of the \"Reva\" component of OpenCloud allows a malicious user to bypass the scope verification of a public link. By exploiting this via the the \"archiver\" service this can be leveraged to create an archive (zip or tar-file) containing all resources that this creator of the public link has access to. This vulnerability is fixed in 2.42.3 and 2.40.3."
    },
    {
      "lang": "es",
      "value": "REVA es una plataforma de interoperabilidad. Antes de las versiones 2.42.3 y 2.40.3, un error en el middleware de autorización GRPC del componente 'Reva' de OpenCloud permite a un usuario malintencionado eludir la verificación de alcance de un enlace público. Al explotar esto a través del servicio 'archiver', se puede aprovechar para crear un archivo (zip o tar) que contenga todos los recursos a los que tiene acceso el creador de dicho enlace público. Esta vulnerabilidad está corregida en las versiones 2.42.3 y 2.40.3."
    }
  ],
  "lastModified": "2026-06-17T10:22:25.583",
  "configurations": [
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