ImageMagick up to 7.1.2-18 JXL Encoder heap-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in ImageMagick up to 7.1.2-18. Impacted is an unknown function of the component JXL Encoder. The manipulation leads to heap-based overflow. This vulnerability is listed as CVE-2026-40183. The attack may be initiated remotely. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in ImageMagick up to 7.1.2-18. It has been rated as critical. This issue affects an unknown code of the component JXL Encoder. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to 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(). Impacted is 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, the JXL encoder has an heap write overflow when a user specifies that the image should be encoded as 16 bit floats. This issue has been fixed in version 7.1.2-19.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-40183 since 04/09/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful 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.

The vulnerability scanner Nessus provides a plugin with the ID 311488 (Debian dsa-6240 : imagemagick - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 7.1.2-19 eliminates this vulnerability. The upgrade is hosted for download at github.com.

The vulnerability is also documented in the databases at Tenable (311488) and CERT Bund (WID-SEC-2026-1075). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Amazon Linux 2
  • SUSE Linux
  • SUSE openSUSE
  • Open Source ImageMagick

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.8

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

CNA Base Score: 5.5
CNA Vector (GitHub_M): 🔒

CVSSv2info

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

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
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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Nessus ID: 311488
Nessus Name: Debian dsa-6240 : imagemagick - security update

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: ImageMagick 7.1.2-19

Timelineinfo

04/09/2026 CVE reserved
04/14/2026 +5 days Advisory disclosed
04/14/2026 +0 days VulDB entry created
05/02/2026 +18 days VulDB entry last update

Sourcesinfo

Product: imagemagick.org

Advisory: GHSA-jvgr-9ph5-m8v4
Status: Confirmed

CVE: CVE-2026-40183 (🔒)
GCVE (CVE): GCVE-0-2026-40183
GCVE (VulDB): GCVE-100-357263
CERT Bund: WID-SEC-2026-1075 - ImageMagick: Mehrere Schwachstellen

Entryinfo

Created: 04/14/2026 08:02
Updated: 05/02/2026 22:05
Changes: 04/14/2026 08:02 (66), 04/22/2026 02:06 (7), 05/02/2026 02:12 (1), 05/02/2026 22:05 (2)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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