CVE-2026-59199

Pillow is a Python imaging library. Prior to 12.3.0, Pillow public image coordinate APIs can trigger a native heap out-of-bounds write when given coordinates near the signed 32-bit integer limits in Image.paste(), Image.crop(), or Image.alpha_composite(). This issue is fixed in version 12.3.0.

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.4% chance of exploitation in the next 30 days; higher than 32% of CVEs (scores of 2026-10-25)

CWEs

CWE-787, CWE-190

Published

2026-07-14

Modified

2026-10-24

Record from

the NVD, synced 2026-10-25

Affected

• python:pillow

Packages (OSV)

References

• https://github.com/python-pillow/Pillow/commit/ceefc348eb3c3844c7f9796ef2cc3a7dd5fbba7b
• https://github.com/python-pillow/Pillow/pull/9703
• https://github.com/python-pillow/Pillow/releases/tag/12.3.0
• https://github.com/python-pillow/Pillow/security/advisories/GHSA-6r8x-57c9-28j4
• https://github.com/python-pillow/Pillow/security/advisories/GHSA-6r8x-57c9-28j4

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