Buffer overflow in Imagemagick
CVE-2026-40310
ImageMagick is free and open-source software used for editing and manipulating digital images. Versions below both 7.1.2-19 and 6.9.13-44, contain a heap out-of-bounds write in the JP2 encoder with when a user specifies an invalid sampling index. This issue has been fixed in versions 6.9.13-44 and 7.1.2-19.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (7.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 7.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Imagemagick — versions < 7.1.2-19, < 6.9.13-44
Weakness classification (CWE)
References
- github.com/ImageMagick/ImageMagick/security/advisories/GHSA-pwg5-6jfc-crvh (Vendor Advisory)
- github.com/ImageMagick/ImageMagick/commit/3d653bea2df085c728a1c8f775808e1e9249d… (Patch)
- github.com/ImageMagick/ImageMagick/releases/tag/7.1.2-19 (Release Notes)
- github.com/dlemstra/Magick.NET/releases/tag/14.12.0 (Release Notes)
Frequently asked questions
- What is CVE-2026-40310?
- CVE-2026-40310 is a medium-severity vulnerability in Imagemagick, classified under Heap-based Buffer Overflow. CVSS score: 5.5/10. Published 2026-04-13.
- How severe is CVE-2026-40310?
- Medium severity. CVSS v3 base score is 5.5 out of 10.