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CVE-2026-86421— ImageMagick before 7.1.2-30 Memory Leak via MSL decoder

Quick assessment

Affected
ImageMagick ImageMagick
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ImageMagick是ImageMagick团队开源的一款图像处理软件。 ImageMagick 7.1.2-30之前版本和6.9.13-55之前版本存在资源管理错误漏洞，该漏洞源于MSL图像解码器存在内存泄漏，特制MSL图像触发内存分配但未正确释放，可能导致攻击者耗尽内存并造成拒绝服务。

CVSS 3.7 · Low EPSS 0.45% · P38

Affected Version Matrix 4

VendorProduct Version RangeStatus
ImageMagick ImageMagick < 7.1.2-30 affected
7.1.2-30 unaffected
< 6.9.13-55 affected
6.9.13-55 unaffected
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I. Basic Information for CVE-2026-86421

Vulnerability Information
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Vulnerability Title
ImageMagick before 7.1.2-30 Memory Leak via MSL decoder
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
ImageMagick 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ImageMagick是ImageMagick团队开源的一款图像处理软件。 ImageMagick 7.1.2-30之前版本和6.9.13-55之前版本存在资源管理错误漏洞，该漏洞源于MSL图像解码器存在内存泄漏，特制MSL图像触发内存分配但未正确释放，可能导致攻击者耗尽内存并造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ImageMagick ImageMagick 0 ~ 7.1.2-30 -
ImageMagick ImageMagick 0 ~ 6.9.13-55 -

II. Public POCs for CVE-2026-86421

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III. Intelligence Information for CVE-2026-86421

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Vendor Advisories for CVE-2026-86421 (2)

Same Patch Batch · ImageMagick · 2026-09-07 · 6 CVEs total

CVE-2026-86420 3.7 LOW ImageMagick before 7.1.2-30 Denial of Service Memory Budget
CVE-2026-86422 3.3 LOW ImageMagick before 7.1.2-30 Path Policy TOCTOU Symlink Race
CVE-2026-86425 3.3 LOW ImageMagick before 7.1.2-30 Heap-use-after-free via Layer
CVE-2026-86423 3.3 LOW ImageMagick before 7.1.2-30 Heap-use-after-free via GetList
CVE-2026-86424 2.5 LOW ImageMagick before 7.1.2-30 Path Traversal via TOCTOU Symlink Race

IV. Related Vulnerabilities

Same product: ImageMagick
Same vendor: ImageMagick
Same weakness: CWE-400

V. Comments for CVE-2026-86421

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