CVE-2026-40183: imagemagick Heap-based Buffer Overflow
CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-40183DEBIAN-CVE-2026-40183CGA-748r-pq5c-m4c6CGA-j8xq-99qc-rmqqCGA-mjgg-q3j4-j29qCGA-p9vp-hjmg-4rv3GHSA-jvgr-9ph5-m8v4CGA-q45q-94cq-rhp5CGA-r57q-vvgh-fwxxCGA-rv49-r4j6-9fxfCGA-vmh9-mccv-gmj8
Published 13-04-2026Last modified 14-04-2026
Vulnerability summary
CVE-2026-40183 is a medium (CVSS 5.5) Heap-based Buffer Overflow vulnerability in imagemagick. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9% of scored vulnerabilities.
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)EPSS score
0.20%
0%100%
Low · +0.01 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 4 · Related 5Timeline
- 13-04-2026PublishedVulnerability first disclosed.
- 14-04-2026Last modifiedVulnerability information updated.
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 metrics
6 scores · 6 sources · 1 versionMedium 5.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HSourcesAll 6 agree
- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · ChainguardEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · NugetEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.20%
Chance of exploitation in the next 30 days
Percentile
9%
Versus all other CVEs
30-day change
+0.01 pp
From 0.19% on 19-09-2026
19-09-202619-10-2026
EPSS score0.20%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
NuGet17 products
- magick.net-q16-anycpu< 14.12.0
- Magick.NET-Q16-arm64< 14.12.0
- magick.net-q16-hdri-anycpu< 14.12.0
- Magick.NET-Q16-HDRI-arm64< 14.12.0
- Magick.NET-Q16-HDRI-OpenMP-arm64< 14.12.0
Chainguard4 products
- imagemagick-6All versions (No fix recorded)
- imagemagick-6-dev< 6.9.13.46-r1
- imagemagick-6-doc< 6.9.13.46-r1
- imagemagick-6-static< 6.9.13.46-r1
Debian1 product
- imagemagick< 8:7.1.1.43+dfsg1-1+deb13u8 | < 8:7.1.2.19+dfsg1-1
Imagemagick1 product
- imagemagick< 7.1.2-19
Ubuntu1 product
- imagemagickAll versions (No fix recorded)
5 vendors · 24 products
References
10 links- github.com/ImageMagick/ImageMagick/security/advisories/GHSA-jvgr-9ph5-m8v4X Refsource CONFIRMREPORTAdvisoryWEBVendor Advisory
