CVE-2026-54060

Pillow: `FontFile.compile()`: `Image.new()` called without `_decompression_bomb_check()`

Description

Pillow is a Python imaging library. Prior to 12.3.0, PIL/FontFile.py FontFile.compile() assembled per-glyph images into a combined bitmap with Image.new("1", (xsize, ysize)) without calling Image._decompression_bomb_check(), allowing a font to trigger excessive allocation during conversion or saving. This issue is fixed in version 12.3.0.

Scores

Weaknesses (CWE)

• CWE-789

Advisories

• GHSA-5x94-69rx-g8h2 — Pillow: `FontFile.compile()`: `Image.new()` called without `_decompression_bomb_check()`
• PYSEC-2026-2254 — Pillow is a Python imaging library. Prior to 12.3.0, PIL/FontFile.py FontFile.compile() assembled per-glyph images into a combined bitmap with Image.new("1", (x

European references

• ENISA EUVD · EUVD-2026-41900
• GCVE · GCVE-0-2026-54060

CERT-FR advisories

• CERTFR-2026-AVI-1366 — Multiples vulnérabilités dans les produits Splunk · cert.ssi.gouv.fr
• CERTFR-2026-AVI-1094 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

• cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:* < 12.3.0

Affected products

References

• https://github.com/python-pillow/Pillow/security/advisories/GHSA-5x94-69rx-g8h2
• https://github.com/python-pillow/Pillow/commit/0a263e6264aa5399988d9acd3bbfbca2ca3ec77d
• https://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rst

Sources