CVE-2026-30937

ImageMagick has a heap buffer overflow in WriteXWDImage due to CARD32 arithmetic overflow in bytes_per_line calculation

State: Published
Severity: 6.8 Medium
Published: Mar 9, 2026
Updated: Mar 10, 2026
Reserved: Mar 7, 2026

Description

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2-16 and 6.9.13-41, a 32-bit unsigned integer overflow in the XWD (X Windows) encoder can cause an undersized heap buffer allocation. When writing a extremely large image an out of bounds heap write can occur. This vulnerability is fixed in 7.1.2-16 and 6.9.13-41.

Scores

CVSS	Score	Vector	Source
3.1	6.8 Medium	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H	GitHub_M

Weaknesses

CWE-122 Heap-based Buffer Overflow
CWE-190 Integer Overflow or Wraparound

Affected Products

Product	Versions
ImageMagickImageMagick	>= 7.0.0, < 7.1.2-16Affected < 6.9.13-41Affected

References

https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-qpg4-j99f-8xcg

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