CVE-2026-40183

CWE-122 — Heap-based Buffer OverflowCWE-787 — Out-of-bounds Write6 documents4 sources
Severity
5.5MEDIUM
EPSS
No EPSS data
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Imagemagick Imagemagick
Timeline
PublishedApr 13

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.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6

Affected Packages1 packages

▶CVEListV5imagemagick/imagemagick< 7.1.2-19

🔴Vulnerability Details

1
CVEList
ImageMagick: Heap buffer overflow when encoding JXL image with a 16-bit float↗2026-04-13
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📋Vendor Advisories

1
Red Hat
ImageMagick: Magick.NET: ImageMagick: Denial of Service via heap write overflow in JXL encoder↗2026-04-13
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💬Community

3
Bugzilla
CVE-2026-40183 ImageMagick: ImageMagick: Denial of Service via heap write overflow in JXL encoder [fedora-all]↗2026-04-13
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Bugzilla
CVE-2026-40183 ImageMagick: ImageMagick: Denial of Service via heap write overflow in JXL encoder [epel-all]↗2026-04-13
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Bugzilla
CVE-2026-40183 ImageMagick: Magick.NET: ImageMagick: Denial of Service via heap write overflow in JXL encoder↗2026-04-13
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CVE-2026-40183 (MEDIUM CVSS 5.5) | ImageMagick is free and open-source | cvebase.io