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) are affected in versions before 14.8.1. Passing a colon-only geometry string to the montage geometry option can make ImageMagick's ThumbnailImage function divide by zero, crashing the process. The source gives few details on who can supply that input. Upgrade to version 14.8.1 or later; no workaround is listed.
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 |
|---|---|---|---|---|
| 3.7 | Low | 3.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0100, the 63rd percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:22 UTC First seen by agentprime
- 31 Oct 2026, 15:22 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-fh55-q5pj-pxgw
- OSV: GHSA-fh55-q5pj-pxgw
- github.com/ImageMagick/ImageMagick/security/advisories/GHSA-fh55-q5pj-pxgw
- nvd.nist.gov/vuln/detail/CVE-2025-55212
- github.com/ImageMagick/ImageMagick/commit/5f0bcf986b8b5e90567750d31a37af502b73f2af
- github.com/ImageMagick/ImageMagick
- github.com/ImageMagick/ImageMagick/blob/0ba1b587be17543b664f7ad538e9e51e0da59d17/MagickCore/geometry.c#L355
- github.com/ImageMagick/ImageMagick/blob/0ba1b587be17543b664f7ad538e9e51e0da59d17/MagickCore/resize.c#L4625-L4629
- github.com/dlemstra/Magick.NET/releases/tag/14.8.1
- lists.debian.org/debian-lts-announce/2025/09/msg00012.html