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CVE-2025-64512

Status: ModifiedHigh (7.8)—

Pdfminer.six is a community maintained fork of the original PDFMiner, a tool for extracting information from PDF documents. Prior to version 20251107, pdfminer.six will execute arbitrary code from a malicious pickle file if provided with a malicious PDF file. The `CMapDB._load_data()` function in pdfminer.six uses `pickle.loads()` to deserialize pickle files. These pickle files are supposed to be part of the pdfminer.six distribution stored in the `cmap/` directory, but a malicious PDF can specify an alternative directory and filename as long as the filename ends in `.pickle.gz`. A malicious, zipped pickle file can then contain code which will automatically execute when the PDF is processed. Version 20251107 fixes the issue.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

Vector CVSS con UI:R (interacción del usuario: abrir PDF malicioso) y acceso local. CWE-502 (deserialización insegura de pickle) permite ejecución de código arbitrario. Se requiere que el usuario procese el PDF para disparar pickle.loads().

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Restrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationExecution PreventionBehavior Prevention on EndpointDisable or Remove Feature or Program

Affected technologies (2)

Debian — Debian LinuxPdfminer — Pdfminer.six

CWEs

References

Raw JSON (NVD)

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      "lang": "en",
      "value": "Pdfminer.six is a community maintained fork of the original PDFMiner, a tool for extracting information from PDF documents. Prior to version 20251107, pdfminer.six will execute arbitrary code from a malicious pickle file if provided with a malicious PDF file. The `CMapDB._load_data()` function in pdfminer.six uses `pickle.loads()` to deserialize pickle files. These pickle files are supposed to be part of the pdfminer.six distribution stored in the `cmap/` directory, but a malicious PDF can specify an alternative directory and filename as long as the filename ends in `.pickle.gz`. A malicious, zipped pickle file can then contain code which will automatically execute when the PDF is processed. Version 20251107 fixes the issue."
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      "value": "Pdfminer.six es una bifurcación mantenida por la comunidad del PDFMiner original, una herramienta para extraer información de documentos PDF. Antes de la versión 20251107, pdfminer.six ejecutará código arbitrario de un archivo pickle malicioso si se le proporciona un archivo PDF malicioso. La función 'CMapDB._load_data()' en pdfminer.six utiliza 'pickle.loads()' para deserializar archivos pickle. Se supone que estos archivos pickle forman parte de la distribución de pdfminer.six almacenada en el directorio 'cmap/', pero un PDF malicioso puede especificar un directorio y nombre de archivo alternativos siempre que el nombre de archivo termine en '.pickle.gz'. Un archivo pickle malicioso y comprimido puede entonces contener código que se ejecutará automáticamente cuando se procese el PDF. La versión 20251107 corrige el problema."
    }
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  "lastModified": "2026-06-17T09:54:29.500",
  "configurations": [
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