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ImageMagick: Heap buffer overflow when encoding JXL image with a 16-bit float

CVSS 3.1 5.5 MEDIUMEUVD CVSS 3.1 5.5 CVSS 3.1 · [email protected] · Secondary 5.5 MEDIUMCVSS 3.1 · [email protected] · Primary 5.5 MEDIUMCVSS_V3 Publisher rating MODERATEFixed by Magick.NET-Q16-AnyCPU 14.12.0Fixed by Magick.NET-Q16-HDRI-AnyCPU 14.12.0Fixed by Magick.NET-Q16-HDRI-OpenMP-arm64 14.12.0Fixed by Magick.NET-Q16-HDRI-arm64 14.12.0KEV status unknown

cve-program · CVE-2026-40183

Published

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.

Read the publisher's advisory

euvd · EUVD-2026-22114

Published

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.

Read the publisher's advisory

nvd · CVE-2026-40183

Published

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.

Read the publisher's advisory

osv · GHSA-jvgr-9ph5-m8v4

Published

The JXL encoder has an heap write overflow when a user specifies that the image should be encoded as 16 bit floats.

Read the publisher's advisory

Affected versions, risk and source history

Exploitation and risk

Source status

CISA KEV lists vulnerabilities known to be exploited. FIRST EPSS estimates the likelihood of exploitation in the next 30 days. An unavailable score does not mean zero risk.

Which CVEs have scores here?

This view includes predictions for CVE identifiers explicitly listed in public NuGet advisories. Microsoft release pages have their own prediction coverage. Check source status for the scope and latest checks.

CVE-2026-40183

No CISA KEV listing is included in this saved record. Exploitation may still have occurred.

FIRST EPSS: 0.19 % · percentile 9.24 % · scored 15 Nov 2026.

Saved 15 Nov 2026 14:45:34 UTC · View this risk record (JSON)

cve-program · CVE-2026-40183

Published

ImageMagick: Heap buffer overflow when encoding JXL image with a 16-bit float

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.

Source published
13 Apr 2026 21:28:20 UTC
Source modified
14 Apr 2026 19:27:39 UTC
Saved here
23 Oct 2026 15:48:27 UTC
Source terms
CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 3.1 · 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

euvd · EUVD-2026-22114

Published

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. T…

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.

Additional publisher context

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Apr 13, 2026, 9:28:20 PM

dateUpdated: Apr 14, 2026, 7:27:39 PM

5 related source bulletins · separate from aliases

SUSE-SU-2026:21380-1: Security update for ImageMagick

CVE-2026-32259 · CVE-2026-32636 · CVE-2026-33535 · CVE-2026-33536 · CVE-2026-33899 · CVE-2026-33900 · CVE-2026-33901 · CVE-2026-33902 · CVE-2026-33905 · CVE-2026-33908 · CVE-2026-34238 · CVE-2026-40169 · CVE-2026-40183 · CVE-2026-40310 · CVE-2026-40311 · CVE-2026-40312

openSUSE-SU-2026:20606-1: Security update for ImageMagick

CVE-2026-32259 · CVE-2026-32636 · CVE-2026-33535 · CVE-2026-33536 · CVE-2026-33899 · CVE-2026-33900 · CVE-2026-33901 · CVE-2026-33902 · CVE-2026-33905 · CVE-2026-33908 · CVE-2026-34238 · CVE-2026-40169 · CVE-2026-40183 · CVE-2026-40310 · CVE-2026-40311 · CVE-2026-40312

SUSE-SU-2026:1597-1: Security update for ImageMagick

CVE-2026-33899 · CVE-2026-33900 · CVE-2026-33901 · CVE-2026-33905 · CVE-2026-33908 · CVE-2026-34238 · CVE-2026-40169 · CVE-2026-40183 · CVE-2026-40310 · CVE-2026-40311 · CVE-2026-40312

SUSE-SU-2026:1598-1: Security update for ImageMagick

CVE-2026-33899 · CVE-2026-33900 · CVE-2026-33901 · CVE-2026-33902 · CVE-2026-33905 · CVE-2026-33908 · CVE-2026-34238 · CVE-2026-40169 · CVE-2026-40183 · CVE-2026-40310 · CVE-2026-40311 · CVE-2026-40312

openSUSE-SU-2026:10586-1: ImageMagick-7.1.2.19-2.1 on GA media

CVE-2026-33899 · CVE-2026-33900 · CVE-2026-33901 · CVE-2026-33902 · CVE-2026-33908 · CVE-2026-34238 · CVE-2026-40169 · CVE-2026-40183 · CVE-2026-40310 · CVE-2026-40311 · CVE-2026-40312

Source published
Apr 13, 2026, 9:28:20 PM (timezone not stated)
Source modified
Apr 14, 2026, 7:27:39 PM (timezone not stated)
Saved here
13 Nov 2026 21:09:50 UTC
Source terms
ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

Source: euvd · ENISA EUVD · source terms and attribution apply. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

EUVD CVSS 3.1 · 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

nvd · CVE-2026-40183

Published

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. T…

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.

Additional publisher context

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Analyzed

Weakness classifications: CWE-122

Original publisher date fields

published: 2026-04-13T22:16:29.643

lastModified: 2026-06-17T10:44:50.077

1 source CPE criteria · context only
  • cpe:2.3:a:imagemagick:imagemagick:*:*:*:*:*:*:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

Source published
13 Apr 2026 22:16:29 UTC
Source modified
17 Jun 2026 10:44:50 UTC
Saved here
25 Oct 2026 09:17:24 UTC
Source terms
NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

Source: nvd · NIST NVD usage terms; underlying source attribution retained. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 3.1 · [email protected] · Secondary · 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS 3.1 · [email protected] · Primary · 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

osv · GHSA-jvgr-9ph5-m8v4

Published

ImageMagick has a heap buffer overflow when encoding JXL image with a 16-bit float

The JXL encoder has an heap write overflow when a user specifies that the image should be encoded as 16 bit floats.

Source published
14 Apr 2026 18:50:40 UTC
Source modified
10 Sep 2026 03:50:48 UTC
Saved here
23 Oct 2026 16:01:25 UTC
Source terms
GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

Source: osv · GitHub Advisory Database · CC-BY-4.0. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS_V3 · CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Publisher rating · MODERATE

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 15 Nov 16:58 UTC · 254 of 275 readable · 250 fully read · documentation 469/469 current