ImageMagick up to 7.1.2-18 MSL Decoder off-by-one

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k1.72-

Summaryinfo

A vulnerability has been found in ImageMagick up to 7.1.2-18 and classified as problematic. This affects an unknown function of the component MSL Decoder. Performing a manipulation results in off-by-one. This vulnerability is known as CVE-2026-40312. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic has been found in ImageMagick up to 7.1.2-18. This affects an unknown part of the component MSL Decoder. The manipulation with an unknown input leads to a off-by-one vulnerability. CWE is classifying the issue as CWE-193. A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value. This is going to have an impact on availability. The summary by CVE is:

ImageMagick is free and open-source software used for editing and manipulating digital images. In versions below 7.1.2-19, an off by one error in the MSL decoder could result in a crash when a malicous MSL file is read. This issue has been fixed in version 7.1.2-19.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-40312 since 04/10/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 7.1.2-19 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 2a06c7be3bba3326caf8b7a8d1fa2e0d4b88998d is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.2
CNA Vector (GitHub_M): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Off-by-one
CWE: CWE-193 / CWE-189
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: ImageMagick 7.1.2-19
Patch: 2a06c7be3bba3326caf8b7a8d1fa2e0d4b88998d

Timelineinfo

04/10/2026 CVE reserved
04/14/2026 +4 days Advisory disclosed
04/14/2026 +0 days VulDB entry created
04/14/2026 +0 days VulDB entry last update

Sourcesinfo

Product: imagemagick.org

Advisory: GHSA-5xg3-585r-9jh5
Status: Confirmed

CVE: CVE-2026-40312 (🔒)
GCVE (CVE): GCVE-0-2026-40312
GCVE (VulDB): GCVE-100-357255

Entryinfo

Created: 04/14/2026 07:58
Changes: 04/14/2026 07:58 (67)
Complete: 🔍
Cache ID: 216::103

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