PyPI/pillow CVE-2026-59205: high 7.5, EPSS 0.39%

Pillow: Controlled heap out-of-bounds write in Pillow `ImageCmsTransform.apply()` via output mode mismatch

Action: Upgrade pillow to 12.3.0 or later.

pip install pillow==12.3.0

Affected

Fixed versions

Sources

• osv: GHSA-9hw9-ch79-4vh6
• https://github.com/python-pillow/Pillow/security/advisories/GHSA-9hw9-ch79-4vh6
• https://nvd.nist.gov/vuln/detail/CVE-2026-59205
• https://github.com/python-pillow/Pillow/pull/9715
• https://github.com/python-pillow/Pillow/commit/a9ffc42bedf4fc0a7ef8d6486e7f9e81e3397721
• https://github.com/pypa/advisory-database/tree/main/vulns/pillow/PYSEC-2026-3453.yaml
• https://github.com/python-pillow/Pillow
• https://github.com/python-pillow/Pillow/releases/tag/12.3.0

CVE-2026-59205 · published 2026-07-20T23:19:00Z · modified 2026-09-10T03:51:11.334365483Z · JSON