CVE-2026-55380
Pillow GdImageFile decompression bomb protection bypass
7.5
HIGH
CVSS 3.1
EPSS 0.36%
Description
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.
How to fix CVE-2026-55380
To remediate CVE-2026-55380, upgrade the affected package to a fixed version below.
- —upgrade to 12.3.0 or later
Is CVE-2026-55380 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 12.3.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |