PyPI/pillow CVE-2026-54059: high 7.5, EPSS 0.41%

Pillow `PcfFontFile._load_bitmaps()`: `Image.frombytes()` called without `_decompression_bomb_check()` — bomb protection bypass via PCF font loading

Action: Upgrade pillow to 12.3.0 or later.

pip install pillow==12.3.0

Affected

Fixed versions

Sources

• osv: GHSA-8v84-f9pq-wr9x
• https://github.com/python-pillow/Pillow/security/advisories/GHSA-8v84-f9pq-wr9x
• https://nvd.nist.gov/vuln/detail/CVE-2026-54059
• https://github.com/python-pillow/Pillow/commit/0a263e6264aa5399988d9acd3bbfbca2ca3ec77d
• https://github.com/pypa/advisory-database/tree/main/vulns/pillow/PYSEC-2026-2253.yaml
• https://github.com/python-pillow/Pillow
• https://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rst

CVE-2026-54059 · published 2026-07-20T21:08:27Z · modified 2026-09-10T03:51:11.229114807Z · JSON