CVE-2026-46521 PUBLISHED

ImageMagick: Heap Buffer Over-Write in MIFF encoder when using LZMA compression

Assigner: GitHub_M
Reserved: 14.05.2026 Published: 10.06.2026 Updated: 11.06.2026

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 6.9.13-48 and 7.1.2-23, when using LZMA compression in the MIFF encoder an out of bounds write can occur due to a missing check. This issue has been patched in versions 6.9.13-48 and 7.1.2-23.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS Score: 5.5

Attack Vector	Local	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	None
User Interaction	Required	Availability Impact	High

CVSS 3.1

Product Status

Vendor	ImageMagick
Product	ImageMagick
Versions	Version < 6.9.13-48 is affected Version < 7.1.2-23 is affected

References

https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-jcqp-6r6f-3mfx

Problem Types

CWE-131: Incorrect Calculation of Buffer Size CWE
CWE-252: Unchecked Return Value CWE
CWE-787: Out-of-bounds Write CWE
CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') CWE