Vulnerability · Published Sep 29, 2026 · Assigned by VulnCheck
CVE-2026-102635ImageMagick before 7.1.2-32 and 6.9.13-57 Uninitialized Heap Memory Disclosure in GIF Decoder
Low 3.7
In plain English
A low-severity security flaw 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 0.3% (higher than 25% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
ImageMagick versions before 7.1.2-32 and 6.9.13-57 contain uninitialized heap memory disclosure in the GIF decoder's application extension handler in coders/gif.c. Attackers can craft malicious GIF files that cause the number parser to read uninitialized heap memory and store contents as image metadata, disclosing sensitive heap information.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | imagemagick | 8:6.9.11.60+dfsg-1.6+deb12u14 | DEBIAN-CVE-2026-102635 |
| Debian:13 | imagemagick | 8:7.1.1.43+dfsg1-1+deb13u13 | DEBIAN-CVE-2026-102635 |
| Debian:14 | imagemagick | 8:7.1.2.33+dfsg1-1 | DEBIAN-CVE-2026-102635 |
| Ubuntu:26.10 | imagemagick | no fix listed | UBUNTU-CVE-2026-102635 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ImageMagick | ImageMagick | 7.0.0-0 – before 7.1.2-320 – before 6.9.13-57 |
Weakness: CWE-908 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
References
- GitHub Security Advisory (GHSA-rvv7-5mh8-vcfc) vendor-advisory
- https://github.com/ImageMagick/ImageMagick/commit/a0ca2c739c0216ff4efbd631d1ba7fd54dba1ff4 patch
- https://github.com/ImageMagick/ImageMagick6/commit/95dc0fd21a684bfac2bdb6fb6638c0ab271adbe5 patch
- https://github.com/ImageMagick/ImageMagick/blob/7.1.2-31/coders/gif.c#L1168-L1196 technical-description
- https://github.com/ImageMagick/ImageMagick product
- VulnCheck Advisory: ImageMagick before 7.1.2-32 and 6.9.13-57 Uninitialized Heap Memory Disclosure in GIF Decoder third-party-advisory