High 7.5Published Jul 14, 2026

CVE-2026-59199Pillow: Heap out-of-bounds write `Image.paste()` / `Image.crop()` via signed coordinate overflow

Updated under an hour ago (Oct 26, 2026, 9:40 PM ET)

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It affects python-pillow Pillow and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for python-pillow Pillow

Exploited in the last 30 days

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: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-190, CWE-787
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Modified
Record last updated: Jul 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

python-pillow Pillow python_pillow:pillow (from the name)	before 12.3.0	CNA record
python pillow python:pillow	before 12.3.0	NVD

References

References

https://github.com/python-pillow/Pillow/security/advisories/GHSA-6r8x-57c9-28j4	x-refsource-confirm, exploit, vendor-advisory
https://github.com/python-pillow/Pillow/pull/9703	x-refsource-misc, exploit, issue-tracking, patch
https://github.com/python-pillow/Pillow/commit/ceefc348eb3c3844c7f9796ef2cc3a7dd5fbba7b	x-refsource-misc, patch
https://github.com/python-pillow/Pillow/releases/tag/12.3.0	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.