Vulnerability · Published Sep 7, 2026 · Assigned by VulnCheck
CVE-2026-86421ImageMagick before 7.1.2-30 Memory Leak via MSL decoder
Low 3.7
In plain English
A low-severity uncontrolled resource consumption 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 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)3.7Low
Exploit odds (30 days)0.5%top 60.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
ImageMagick before 7.1.2-30 and 6.9.13-55 contains a memory leak in the MSL image decoder. A crafted MSL image triggers memory allocation without proper deallocation, allowing an attacker to exhaust memory and cause a denial of service.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | imagemagick | 8:6.9.11.60+dfsg-1.6+deb12u14 | DEBIAN-CVE-2026-86421 |
| Debian:13 | imagemagick | 8:7.1.1.43+dfsg1-1+deb13u13 | DEBIAN-CVE-2026-86421 |
| Debian:14 | imagemagick | 8:7.1.2.31+dfsg1-1 | DEBIAN-CVE-2026-86421 |
| Ubuntu:26.10 | imagemagick | no fix listed | UBUNTU-CVE-2026-86421 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ImageMagick | ImageMagick | 7.0.0 – before 7.1.2-30 |
| ImageMagick | ImageMagick | 0 – before 6.9.13-55 |
Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
References
- GitHub Security Advisory (GHSA-4jv7-q6xw-6f4x) vendor-advisory
- VulnCheck Advisory: ImageMagick before 7.1.2-30 Memory Leak via MSL decoder third-party-advisory