CVE-2026-59198

Pillow TGA RLE encoder can serialize up to ~57 KB of adjacent heap data into generated images

State: Published
Severity: 6.5 Medium
Published: Jul 14, 2026
Updated: Jul 14, 2026
Reserved: Jul 2, 2026

Description

Pillow is a Python imaging library. From 5.2.0 until 12.3.0, Pillow's TGA RLE encoder reads past its packed row buffer when saving a mode 1 image with TGA RLE compression, allowing adjacent process heap bytes to be copied into the generated TGA file. This issue is fixed in version 12.3.0.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L	GitHub_M

Weaknesses

CWE-125 Out-of-bounds Read

Affected Products

Product	Versions
Pillowpython-pillow	>= 5.2.0, < 12.3.0Affected

References

https://github.com/python-pillow/Pillow/security/advisories/GHSA-fj7v-r99m-22gq
https://github.com/python-pillow/Pillow/pull/9709
https://github.com/python-pillow/Pillow/commit/eada3cbd7fb9963ee90673fb7b5270124a0d5f4b
https://github.com/python-pillow/Pillow/releases/tag/12.3.0

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