Vulnerability · Published Jun 21, 2026 · Assigned by VulnCheck
CVE-2026-56378ImageMagick - Heap Out-of-Bounds Read in PCD Decoder
Low 3.7
In plain English
A low-severity out-of-bounds read 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 0.4% (higher than 33% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)3.7Low
Exploit odds (30 days)0.4%top 66.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | imagemagick | 8:6.9.11.60+dfsg-1.6+deb12u12 | DEBIAN-CVE-2026-56378 |
| Debian:13 | imagemagick | 8:7.1.1.43+dfsg1-1+deb13u11 | DEBIAN-CVE-2026-56378 |
| Debian:14 | imagemagick | 8:7.1.2.15+dfsg1-1 | DEBIAN-CVE-2026-56378 |
| NuGet | magick.net-q16-anycpu | 14.10.3 | GHSA-wgxp-q8xq-wpp9 |
| NuGet | magick.net-q16-arm64 | 14.10.3 | GHSA-wgxp-q8xq-wpp9 |
| NuGet | magick.net-q16-hdri-anycpu | 14.10.3 | GHSA-wgxp-q8xq-wpp9 |
| NuGet | magick.net-q16-hdri-arm64 | 14.10.3 | GHSA-wgxp-q8xq-wpp9 |
| NuGet | magick.net-q16-hdri-openmp-arm64 | 14.10.3 | GHSA-wgxp-q8xq-wpp9 |
| NuGet | magick.net-q16-hdri-openmp-x64 | 14.10.3 | GHSA-wgxp-q8xq-wpp9 |
| NuGet | magick.net-q16-hdri-x64 | 14.10.3 | GHSA-wgxp-q8xq-wpp9 |
| NuGet | magick.net-q16-hdri-x86 | 14.10.3 | GHSA-wgxp-q8xq-wpp9 |
| NuGet | magick.net-q16-openmp-arm64 | 14.10.3 | GHSA-wgxp-q8xq-wpp9 |
| NuGet | magick.net-q16-openmp-x64 | 14.10.3 | GHSA-wgxp-q8xq-wpp9 |
| NuGet | magick.net-q16-openmp-x86 | 14.10.3 | GHSA-wgxp-q8xq-wpp9 |
| NuGet | magick.net-q16-x64 | 14.10.3 | GHSA-wgxp-q8xq-wpp9 |
| NuGet | magick.net-q16-x86 | 14.10.3 | GHSA-wgxp-q8xq-wpp9 |
| NuGet | magick.net-q8-anycpu | 14.10.3 | GHSA-wgxp-q8xq-wpp9 |
| NuGet | magick.net-q8-arm64 | 14.10.3 | GHSA-wgxp-q8xq-wpp9 |
| NuGet | magick.net-q8-openmp-arm64 | 14.10.3 | GHSA-wgxp-q8xq-wpp9 |
| NuGet | magick.net-q8-openmp-x64 | 14.10.3 | GHSA-wgxp-q8xq-wpp9 |
| NuGet | magick.net-q8-x64 | 14.10.3 | GHSA-wgxp-q8xq-wpp9 |
| NuGet | magick.net-q8-x86 | 14.10.3 | GHSA-wgxp-q8xq-wpp9 |
| Ubuntu:25.10 | imagemagick | no fix listed | UBUNTU-CVE-2026-56378 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ImageMagick | ImageMagick | 7.0.0 – before 7.1.2-15 |
| ImageMagick | ImageMagick | 0 – before 6.9.13-40 |
Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
References
- GHSA Advisory GHSA-wgxp-q8xq-wpp9 vendor-advisory
- VulnCheck Advisory: ImageMagick - Heap Out-of-Bounds Read in PCD Decoder third-party-advisory