Heap Write Overflow Vulnerability in ImageMagick JXL Encoder
CVE-2026-40183

5.5MEDIUM

Key Information:

Vendor

Imagemagick
Status
Imagemagick
Vendor
CVE Published:
13 April 2026

What is CVE-2026-40183?

ImageMagick is widely utilized for editing and manipulating digital images. A vulnerability has been identified in the JXL encoder, specifically a heap write overflow when encoding images as 16-bit floats. This issue is present in versions prior to 7.1.2-19 and poses a risk of memory corruption. Users are advised to upgrade to the patched version 7.1.2-19 to safeguard against potential exploitation.

Affected Version(s)

ImageMagick < 7.1.2-19

References

https://github.com/ImageMagick/ImageMagick/security/advis...
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https://github.com/ImageMagick/ImageMagick/releases/tag/7...
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https://github.com/dlemstra/Magick.NET/releases/tag/14.12.0
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CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.