CVE-2026-55380

HIGH SEVERITY

CVSS Score & Metrics

Base Score

7.5 / 10

Vector String

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

Vulnerability 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.

Vulnerability Details

Published Date

July 06, 2026

Last Modified

July 07, 2026

CWE ID

CWE-789

Source

NVD

Vendor

python-pillow

Product

Pillow

External References

https://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rst
https://github.com/python-pillow/Pillow/commit/f39b0ae6624eb2d7c5c5d651d9bb5fdbd96a8675
https://github.com/python-pillow/Pillow/security/advisories/GHSA-phj9-mv4w-65pm
https://github.com/python-pillow/Pillow/security/advisories/GHSA-phj9-mv4w-65pm

CVE-2026-55380

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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