CVE-2026-56378 json
ImageMagick - Heap Out-of-Bounds Read in PCD Decoder
published 2026-02-25 8 mo ago modified 2026-11-08 24 h ago also EUVD-2026-38174 , GHSA-jmqv-2mx7-544h , GHSA-wgxp-q8xq-wpp9 , JLSEC-2026-1059
- cvss
- 3.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 33%
- public exploits
- 0
- none known
Summary
ImageMagick before 7.1.2-15 (and 6.x before 6.9.13-40) contains a heap out-of-bounds read in the PCD coder's DecodeImage loop. A crafted PCD file can trigger a one-byte heap out-of-bounds read during image decoding, resulting in denial of service and potential disclosure of an adjacent heap byte.
Patch / fix
- nuget Magick.NET-Q16-AnyCPU 14.10.3
- nuget Magick.NET-Q16-HDRI-AnyCPU 14.10.3
- nuget Magick.NET-Q16-HDRI-OpenMP-arm64 14.10.3
- nuget Magick.NET-Q16-HDRI-OpenMP-x64 14.10.3
- nuget Magick.NET-Q16-HDRI-arm64 14.10.3
- nuget Magick.NET-Q16-HDRI-x64 14.10.3
- nuget Magick.NET-Q16-HDRI-x86 14.10.3
- nuget Magick.NET-Q16-OpenMP-arm64 14.10.3
- nuget Magick.NET-Q16-OpenMP-x64 14.10.3
- nuget Magick.NET-Q16-OpenMP-x86 14.10.3
- nuget Magick.NET-Q16-arm64 14.10.3
- nuget Magick.NET-Q16-x64 14.10.3
- nuget Magick.NET-Q16-x86 14.10.3
- nuget Magick.NET-Q8-AnyCPU 14.10.3
- nuget Magick.NET-Q8-OpenMP-arm64 14.10.3
- nuget Magick.NET-Q8-OpenMP-x64 14.10.3
- nuget Magick.NET-Q8-arm64 14.10.3
- nuget Magick.NET-Q8-x64 14.10.3
- nuget Magick.NET-Q8-x86 14.10.3
- julia ImageMagick_jll 7.1.0+0, 7.1.2023+0
- ImageMagick ImageMagick 6.9.13-40, 7.1.2-15
- imagemagick Debian 12 8:6.9.11.60+dfsg-1.6+deb12u12
- imagemagick Debian 13 8:7.1.1.43+dfsg1-1+deb13u11
- imagemagick Debian 14 8:7.1.2.15+dfsg1-1
debian advisories DEBIAN-CVE-2026-56378
- imagemagick Ubuntu Pro 14.04 LTS 8:6.7.7.10-6ubuntu3.13+esm25
- imagemagick Ubuntu Pro 16.04 LTS 8:6.8.9.9-7ubuntu5.16+esm24
- imagemagick Ubuntu Pro 18.04 LTS 8:6.9.7.4+dfsg-16ubuntu6.15+esm16
- imagemagick Ubuntu Pro 20.04 LTS 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm14
- imagemagick Ubuntu Pro 22.04 LTS 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm14
- imagemagick Ubuntu Pro 24.04 LTS 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm13
ubuntu advisories UBUNTU-CVE-2026-56378
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2026-56378 updated cvss 4.8
Magick.NET: ImageMagick: Denial of Service and Information Disclosure via crafted PCD file
-
Red Hat Enterprise Linux 6 ImageMagick, ImageMagick-c++, ImageMagick-perl Red Hat Enterprise Linux 7 ImageMagick, ImageMagick-c++, ImageMagick-perlaffected: workaround, no fix planned “Out of support scope”
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.3 | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N |
| CNA | 3.1 | 3.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N |
| GitHub | 3.1 | 3.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N |
| CNA | 4.0 | 6.3 | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H |
| OSV | 3.1 | 8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| nuget | Magick.NET-Q16-AnyCPU | <14.10.3 |
14.10.3 |
| nuget | Magick.NET-Q16-HDRI-AnyCPU | <14.10.3 |
14.10.3 |
| nuget | Magick.NET-Q16-HDRI-OpenMP-arm64 | <14.10.3 |
14.10.3 |
| nuget | Magick.NET-Q16-HDRI-OpenMP-x64 | <14.10.3 |
14.10.3 |
| nuget | Magick.NET-Q16-HDRI-arm64 | <14.10.3 |
14.10.3 |
| nuget | Magick.NET-Q16-HDRI-x64 | <14.10.3 |
14.10.3 |
| nuget | Magick.NET-Q16-HDRI-x86 | <14.10.3 |
14.10.3 |
| nuget | Magick.NET-Q16-OpenMP-arm64 | <14.10.3 |
14.10.3 |
| nuget | Magick.NET-Q16-OpenMP-x64 | <14.10.3 |
14.10.3 |
| nuget | Magick.NET-Q16-OpenMP-x86 | <14.10.3 |
14.10.3 |
| nuget | Magick.NET-Q16-arm64 | <14.10.3 |
14.10.3 |
| nuget | Magick.NET-Q16-x64 | <14.10.3 |
14.10.3 |
| nuget | Magick.NET-Q16-x86 | <14.10.3 |
14.10.3 |
| nuget | Magick.NET-Q8-AnyCPU | <14.10.3 |
14.10.3 |
| nuget | Magick.NET-Q8-OpenMP-arm64 | <14.10.3 |
14.10.3 |
| nuget | Magick.NET-Q8-OpenMP-x64 | <14.10.3 |
14.10.3 |
| nuget | Magick.NET-Q8-arm64 | <14.10.3 |
14.10.3 |
| nuget | Magick.NET-Q8-x64 | <14.10.3 |
14.10.3 |
| nuget | Magick.NET-Q8-x86 | <14.10.3 |
14.10.3 |
| julia | ImageMagick_jll | <7.1.0+0 >=7.1.2001+0, <7.1.2023+0 |
7.1.0+0 7.1.2023+0 |
Affected products
- ImageMagick ImageMagick
Classification
- Weakness
-
- CWE-125 Out-of-bounds Read
References
-
github.com
/ImageMagick/ImageMagick/commit/436e5d2589e3c0adc10d9aa189e81d5d088d8207
web
-
github.com
/ImageMagick/ImageMagick/security/advisories/GHSA-wgxp-q8xq-wpp9
vendor-advisory, web, third-party-advisory
-
vulncheck.com
/advisories/imagemagick-heap-out-of-bounds-read-in-pcd-decoder
third-party-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-56378
advisory, web
-
github.com
/ImageMagick/ImageMagick
package
-
github.com
/dlemstra/Magick.NET/releases/tag/14.10.3
web
-
github.com
/advisories/GHSA-jmqv-2mx7-544h
web
Sources
- CVE List CVE-2026-56378
- GitHub Advisory GHSA-jmqv-2mx7-544h
- GitHub Advisory GHSA-wgxp-q8xq-wpp9
- NVD CVE-2026-56378
- OSV JLSEC-2026-1059
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.