CVE-2026-40310
Received Received - Intake
Heap Out-of-Bounds Write in ImageMagick JP2 Encoder

Publication date: 2026-04-13

Last updated on: 2026-04-17

Assigner: GitHub, Inc.

Description
ImageMagick is free and open-source software used for editing and manipulating digital images. Versions below both 7.1.2-19 and 6.9.13-44, contain a heap out-of-bounds write in the JP2 encoder with when a user specifies an invalid sampling index. This issue has been fixed in versions 6.9.13-44 and 7.1.2-19.
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Meta Information
Published
2026-04-13
Last Modified
2026-04-17
Generated
2026-06-16
AI Q&A
2026-04-14
EPSS Evaluated
2026-06-15
NVD
CVE-2026-40310
EUVD
EUVD-2026-22116
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
imagemagick imagemagick to 6.9.13-44 (exc)
imagemagick imagemagick From 7.0.0-0 (inc) to 7.1.2-19 (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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Mitigation Strategies

To mitigate this vulnerability, you should upgrade ImageMagick to version 7.1.2-19 or later, or version 6.9.13-44 or later, as these versions contain the fix for the heap out-of-bounds write issue in the JP2 encoder.

Executive Summary

This vulnerability exists in ImageMagick versions below 7.1.2-19 and 6.9.13-44. It is a heap out-of-bounds write issue in the JP2 encoder that occurs when a user specifies an invalid sampling index.

Impact Analysis

The vulnerability can lead to a heap out-of-bounds write, which may cause a denial of service or potentially allow an attacker to execute arbitrary code. The CVSS score indicates a low attack vector (local), low attack complexity, no privileges required, user interaction required, unchanged scope, no confidentiality or integrity impact, but high availability impact.

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