CVE-2026-55380

Pillow is a Python imaging library. Prior to 12.3.0, PIL/GdImageFile.py GdImageFile._open() read image dimensions from the GD 2.x header and stored them in self._size without calling Image._decompression_bomb_check(), allowing a crafted .gd file to trigger excessive C-heap allocation when loaded. This issue is fixed in version 12.3.0.

CVSS v3.1

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.42% chance of exploitation in the next 30 days, 35th percentile

Published

2026-07-06

Proof-of-concept exploits (1)

• advisories/GHSA-phj9-mv4w-65pm

References

• CVE Record
• NVD entry

Related

• CVE-2026-55379
• CVE-2026-55388
• CVE-2026-5537
• CVE-2026-55389
• CVE-2026-5535
• CVE-2026-5539