Buffer overflow in Dlemstra Magick.net
CVE-2026-27799
ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2-15 and 6.9.13-40, a heap buffer over-read vulnerability exists in the DJVU image format handler. The vulnerability occurs due to integer truncation when calculating the stride (row size) for pixel buffer allocation. The stride calculation overflows a 32-bit signed integer, resulting in an out-of-bounds memory reads. Versions 7.1.2-15 and 6.9.13-40 contain a patch.
Vulnerability class: Buffer Overflow
EPSS: 0.001 (2.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L.
Affected products
- Dlemstra Magick.net
- Imagemagick — versions < 6.9.13-40, >= 7.0.0, < 7.1.2-15
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-27799?
- CVE-2026-27799 is a medium-severity vulnerability in Dlemstra Magick.net, classified under Heap-based Buffer Overflow. CVSS score: 4.0/10. Published 2026-02-26.
- How severe is CVE-2026-27799?
- Medium severity. CVSS v3 base score is 4.0 out of 10.