Vulnerability · Published Apr 13, 2026 · Assigned by GitHub_M
CVE-2026-40183ImageMagick: Heap buffer overflow when encoding JXL image with a 16-bit float
Medium 5.5
In plain English
A medium-severity heap buffer overflow in ImageMagick from ImageMagick. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.2%top 91.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | imagemagick | 7.1.2.19-r0 | ALPINE-CVE-2026-40183 |
| Alpine:v3.24 | imagemagick | 7.1.2.19-r0 | ALPINE-CVE-2026-40183 |
| Debian:13 | imagemagick | 8:7.1.1.43+dfsg1-1+deb13u8 | DEBIAN-CVE-2026-40183 |
| Debian:14 | imagemagick | 8:7.1.2.19+dfsg1-1 | DEBIAN-CVE-2026-40183 |
| NuGet | magick.net-q16-anycpu | 14.12.0 | GHSA-jvgr-9ph5-m8v4 |
| NuGet | magick.net-q16-arm64 | 14.12.0 | GHSA-jvgr-9ph5-m8v4 |
| NuGet | magick.net-q16-hdri-anycpu | 14.12.0 | GHSA-jvgr-9ph5-m8v4 |
| NuGet | magick.net-q16-hdri-arm64 | 14.12.0 | GHSA-jvgr-9ph5-m8v4 |
| NuGet | magick.net-q16-hdri-openmp-arm64 | 14.12.0 | GHSA-jvgr-9ph5-m8v4 |
| NuGet | magick.net-q16-hdri-x64 | 14.12.0 | GHSA-jvgr-9ph5-m8v4 |
| NuGet | magick.net-q16-hdri-x86 | 14.12.0 | GHSA-jvgr-9ph5-m8v4 |
| NuGet | magick.net-q16-openmp-arm64 | 14.12.0 | GHSA-jvgr-9ph5-m8v4 |
| NuGet | magick.net-q16-openmp-x64 | 14.12.0 | GHSA-jvgr-9ph5-m8v4 |
| NuGet | magick.net-q16-x64 | 14.12.0 | GHSA-jvgr-9ph5-m8v4 |
| NuGet | magick.net-q16-x86 | 14.12.0 | GHSA-jvgr-9ph5-m8v4 |
| NuGet | magick.net-q8-anycpu | 14.12.0 | GHSA-jvgr-9ph5-m8v4 |
| NuGet | magick.net-q8-arm64 | 14.12.0 | GHSA-jvgr-9ph5-m8v4 |
| NuGet | magick.net-q8-openmp-arm64 | 14.12.0 | GHSA-jvgr-9ph5-m8v4 |
| NuGet | magick.net-q8-openmp-x64 | 14.12.0 | GHSA-jvgr-9ph5-m8v4 |
| NuGet | magick.net-q8-x64 | 14.12.0 | GHSA-jvgr-9ph5-m8v4 |
| NuGet | magick.net-q8-x86 | 14.12.0 | GHSA-jvgr-9ph5-m8v4 |
| Ubuntu:25.10 | imagemagick | no fix listed | UBUNTU-CVE-2026-40183 |
| Ubuntu:26.10 | imagemagick | no fix listed | UBUNTU-CVE-2026-40183 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ImageMagick | ImageMagick | < 7.1.2-19 |
Weakness: CWE-122 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
References
- https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-jvgr-9ph5-m8v4 x_refsource_CONFIRM
- https://github.com/ImageMagick/ImageMagick/releases/tag/7.1.2-19 x_refsource_MISC
- https://github.com/dlemstra/Magick.NET/releases/tag/14.12.0 x_refsource_MISC