CVE-2026-59199

Description

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.

PUBLISHED Reserved 2026-07-02 | Published 2026-07-14 | Updated 2026-07-14 | Assigner GitHub_M

Problem types

CWE-190: Integer Overflow or Wraparound

CWE-787: Out-of-bounds Write

Product status

References

github.com/...Pillow/security/advisories/GHSA-6r8x-57c9-28j4

github.com/python-pillow/Pillow/pull/9703

github.com/...ommit/ceefc348eb3c3844c7f9796ef2cc3a7dd5fbba7b

github.com/python-pillow/Pillow/releases/tag/12.3.0

cve.org (CVE-2026-59199)

nvd.nist.gov (CVE-2026-59199)

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