CVE-2026-59200

PoC —

CVSS 3.1

7.5 high

EPSS

<1%p32

Published

Jul 14, 2026 (Jul 14, 2026)

Modified

Jul 21, 2026

Description

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.

Vendors: python
Products: pillow
Weakness: CWE-400, CWE-770
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (0.4%)

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