CVE-2026-59200 (High) detected in Pillow-9.1.0-cp310-cp310-macosx_10_9_x86_64.whl

[mend-bolt-for-github]

CVE-2026-59200 - High Severity Vulnerability

Vulnerable Library - Pillow-9.1.0-cp310-cp310-macosx_10_9_x86_64.whl

Python Imaging Library (Fork)

Library home page: https://files.pythonhosted.org/packages/0c/6a/f0021d1959d2778289476d60470aba964fb08dda587ec53929272e5ed3dc/Pillow-9.1.0-cp310-cp310-macosx_10_9_x86_64.whl

Dependency Hierarchy:

• darts-0.13.1-py3-none-any.whl (Root Library)
  • prophet-1.0.1.tar.gz
    • matplotlib-3.5.1-cp39-cp39-manylinux_2_5_x86_64.manylinux1_x86_64.whl
      • ❌ Pillow-9.1.0-cp310-cp310-macosx_10_9_x86_64.whl (Vulnerable Library)

Found in base branch: main

Vulnerability Details

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.

Publish Date: 2026-07-14

URL: CVE-2026-59200

CVSS 3 Score Details (7.5)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: High

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: GHSA-jjj6-mw9f-p565

Release Date: 2026-07-14

Fix Resolution (pillow): 12.3.0

Direct dependency fix Resolution (darts): 0.14.0

---

Step up your Open Source Security Game with Mend here