Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Magick.NET-Q16 packages (AnyCPU, HDRI, OpenMP and architecture-specific variants) before 14.10.3 are vulnerable. A user who opens a crafted PCD file can trigger a 1-byte heap out-of-bounds read while decoding, which may cause a denial of service or leak an adjacent heap byte. Upgrade to version 14.10.3 or later.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 6.3 | Medium | 4.0 | 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 (VulnCheck) |
- CISA KEV Not listed.
- EPSS 0.0039, the 33rd percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 25 Feb 2026, 19:12 UTC Confirmed by GitHub Advisory Database
- 21 Jun 2026, 13:26 UTC Confirmed by the CVE List
- 31 Oct 2026, 15:22 UTC First seen by agentprime
- 31 Oct 2026, 15:22 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-wgxp-q8xq-wpp9
- OSV: GHSA-wgxp-q8xq-wpp9
- github.com/ImageMagick/ImageMagick/security/advisories/GHSA-wgxp-q8xq-wpp9
- nvd.nist.gov/vuln/detail/CVE-2026-56378
- github.com/ImageMagick/ImageMagick/commit/436e5d2589e3c0adc10d9aa189e81d5d088d8207
- github.com/ImageMagick/ImageMagick
- github.com/dlemstra/Magick.NET/releases/tag/14.10.3
- www.vulncheck.com/advisories/imagemagick-heap-out-of-bounds-read-in-pcd-decoder