What is CVE-2026-55380?

CVE-2026-55380 is a high-severity vulnerability in Python-pillow Pillow, classified under CWE-789. CVSS score: 7.5/10. Published 2026-07-06.

How severe is CVE-2026-55380?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Python-pillow Pillow

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 .g…

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Python-pillow Pillow — versions < 12.3.0

Weakness classification (CWE)

CWE-789

References

security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-55380?: CVE-2026-55380 is a high-severity vulnerability in Python-pillow Pillow, classified under CWE-789. CVSS score: 7.5/10. Published 2026-07-06.
How severe is CVE-2026-55380?: High severity. CVSS v3 base score is 7.5 out of 10.