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CVE-2026-59200

Estado: AnalizadaAlta (7.5)—

Pillow is a Python imaging library. From 5.1.0 until 12.3.0, PdfParser.PdfStream.decode() in PIL/PdfParser.py calls zlib.decompress() with bufsize set to the PDF stream Length field without bounding the decompressed output size, allowing a crafted FlateDecode PDF stream to exhaust memory from a small file. This issue is fixed in version 12.3.0.

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.

PDF malformado remoto sin autenticación (AV:N/PR:N/UI:N) causa DoS por agotamiento de memoria en zlib.decompress() sin límite de salida.

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

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (1)

Python — Pillow

CWE

Referencias

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{
  "id": "CVE-2026-59200",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
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          "options": [
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            },
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            },
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            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-07-14T19:43:40.467012Z"
        }
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          "userInteraction": "NONE",
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    }
  ],
  "lastModified": "2026-07-21T15:52:40.107",
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