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CVE-2026-26065

Estado: AnalizadaCrítica (9.3)—

calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Versions 9.2.1 and below are vulnerable to Path Traversal through PDB readers (both 132-byte and 202-byte header variants) that allow arbitrary file writes with arbitrary extension and arbitrary content anywhere the user has write permissions. Files are written in 'wb' mode, silently overwriting existing files. This can lead to potential code execution and Denial of Service through file corruption. This issue has been fixed in version 9.3.0.

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 CVSS AV:L + UI:A indica explotación en cliente (apertura de archivo PDB); impacto: sobrescritura arbitraria de archivos (T1565.001), potencial DoS por corrupción (T1499.004) y ejecución de código (T1059) mediante escritura de archivos ejecutables.

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

Restrict Web-Based ContentRestrict File and Directory PermissionsPrivileged Account ManagementRemote Data StorageLimit Software InstallationFilter Network Traffic

Tecnologías afectadas (1)

Calibre-ebook — Calibre

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2026-26065",
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          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "none"
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            },
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              "technicalImpact": "total"
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          "version": "2.0.3",
          "timestamp": "2026-02-20T16:41:04.261516Z"
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          "valueDensity": "NOT_DEFINED",
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  "published": "2026-02-20T02:16:53.730",
  "references": [
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      "url": "https://github.com/kovidgoyal/calibre/commit/b6da1c3878c06eb1356cb0ec1106cb66e0e9bfb8",
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        "Third Party Advisory"
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  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
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          "value": "CWE-22"
        }
      ]
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      "lang": "en",
      "value": "calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Versions 9.2.1 and below are vulnerable to Path Traversal through PDB readers (both 132-byte and 202-byte header variants) that allow arbitrary file writes with arbitrary extension and arbitrary content anywhere the user has write permissions. Files are written in 'wb' mode, silently overwriting existing files. This can lead to potential code execution and Denial of Service through file corruption. This issue has been fixed in version 9.3.0."
    },
    {
      "lang": "es",
      "value": "calibre es un gestor de libros electrónicos multiplataforma para visualizar, convertir, editar y catalogar libros electrónicos. Las versiones 9.2.1 e inferiores son vulnerables a saltos de ruta a través de lectores PDB (tanto variantes de cabecera de 132 bytes como de 202 bytes) que permiten escrituras arbitrarias de archivos con extensión y contenido arbitrarios en cualquier lugar donde el usuario tenga permisos de escritura. Los archivos se escriben en modo 'wb', sobrescribiendo silenciosamente los archivos existentes. Esto puede llevar a una posible ejecución de código y denegación de servicio a través de la corrupción de archivos. Este problema ha sido solucionado en la versión 9.3.0."
    }
  ],
  "lastModified": "2026-06-17T10:25:40.420",
  "configurations": [
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        {
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