Bug 2500060 (CVE-2026-59200) - CVE-2026-59200 Pillow: Pillow: Denial of service via crafted PDF stream
Summary: CVE-2026-59200 Pillow: Pillow: Denial of service via crafted PDF stream
Keywords:
Status: NEW
Alias: CVE-2026-59200
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-14 17:03 UTC by OSIDB Bzimport
Modified: 2026-07-16 10:02 UTC (History)
57 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-07-14 17:03:08 UTC 
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.
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