Bug 2497455 (CVE-2026-55380) - CVE-2026-55380 python-pillow: Pillow: Denial of Service via crafted GD 2.x image file
Summary: CVE-2026-55380 python-pillow: Pillow: Denial of Service via crafted GD 2.x im...
Keywords:
Status: NEW
Alias: CVE-2026-55380
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2497659 2497660
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-06 20:02 UTC by OSIDB Bzimport
Modified: 2026-07-14 18:13 UTC (History)
60 users (show)

Fixed In Version:
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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:39127 0 None None None 2026-07-14 08:41:53 UTC

Description OSIDB Bzimport 2026-07-06 20:02:05 UTC 
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.
Comment 4 errata-xmlrpc 2026-07-14 08:41:49 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:39127 https://access.redhat.com/errata/RHSA-2026:39127
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