CVE-2026-46520
Undergoing Analysis Undergoing Analysis - In Progress
Heap Write Vulnerability in ImageMagick

Publication date: 2026-06-10

Last updated on: 2026-06-11

Assigner: GitHub, Inc.

Description
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 reading multiple images with different dimensions an out of bounds heap write can occur. This issue has been patched in versions 6.9.13-48 and 7.1.2-23.
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Meta Information
Published
2026-06-10
Last Modified
2026-06-11
Generated
2026-06-11
AI Q&A
2026-06-11
EPSS Evaluated
N/A
NVD
CVE-2026-46520
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
imagemagick imagemagick to 7.1.2-23 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.
CWE-122 A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
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Executive Summary

This vulnerability exists in ImageMagick, a 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 ImageMagick reads multiple images with different dimensions, it can trigger an out of bounds heap write. This means that the software may write data outside the allocated memory buffer, which can lead to unpredictable behavior or crashes. The issue has been fixed in the specified patched versions.

Impact Analysis

The vulnerability can impact you by causing a denial of service or potentially allowing an attacker to execute arbitrary code due to the out of bounds heap write. According to the CVSS score of 7.5 with an attack vector of network and no privileges or user interaction required, an attacker could exploit this remotely to disrupt the availability of the system running vulnerable versions of ImageMagick.

Mitigation Strategies

To mitigate this vulnerability, you should update ImageMagick to version 6.9.13-48 or later, or version 7.1.2-23 or later, where the issue has been patched.

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