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CVE-2026-59200

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-59200

Severity

7.5

High

CVSS V3

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Summary

Pillow: Decompression Bomb DoS via PdfParser.PdfStream.decode()

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.

References

Affected packages

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