CVE-2026-42309

UNKNOWN 0.0

Pillow: Heap buffer overflow with nested list coordinates

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

Pillow is a Python imaging library. From version 11.2.1 to before version 12.2.0, passing nested lists as coordinates to APIs that accept coordinates such as ImagePath.Path, ImageDraw.ImageDraw.polygon and ImageDraw.ImageDraw.line could cause a heap buffer overflow, as nested lists were recursively unpacked beyond the allocated buffer. Coordinate lists are now validated to contain exactly two numeric coordinates. This issue has been patched in version 12.2.0.

CWE	CWE-122
Vendor	python-pillow
Product	pillow
Published	May 9, 2026

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Affected Versions

python-pillow / Pillow

>= 11.2.1, < 12.2.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/python-pillow/Pillow/security/advisories/GHSA-5xmw-vc9v-4wf2 github.com: https://github.com/python-pillow/Pillow/releases/tag/12.2.0