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CVE-2026-56376— ImageMagick - Heap Use-After-Free in Meta Coder

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团队开源的一套开源的图像处理软件。可读取、转换或写入多种格式的图片。 ImageMagick 7.1.2-15之前版本和6.9.13-40之前版本存在资源管理错误漏洞，该漏洞源于meta coder中存在堆释放后重用问题，当内存分配失败时，一个字节被写入到过时指针，远程攻击者通过处理特制图像文件可触发此漏洞，导致拒绝服务。

CVSS 3.7 · Low EPSS 0.32% · P25

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 4

VendorProduct Version RangeStatus
ImageMagick ImageMagick < 7.1.2-15 affected
7.1.2-15 unaffected
< 6.9.13-40 affected
6.9.13-40 unaffected
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I. Basic Information for CVE-2026-56376

Vulnerability Information
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Vulnerability Title
ImageMagick - Heap Use-After-Free in Meta Coder
Source: CVE Program / CVE List V5
Vulnerability Description
ImageMagick before 7.1.2-15 and 6.9.13-40 contains a heap use-after-free in the meta coder: when memory allocation fails, a single byte is written to a stale pointer. Remote attackers can trigger it by processing specially crafted image files, causing 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
释放后使用
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团队开源的一套开源的图像处理软件。可读取、转换或写入多种格式的图片。 ImageMagick 7.1.2-15之前版本和6.9.13-40之前版本存在资源管理错误漏洞，该漏洞源于meta coder中存在堆释放后重用问题，当内存分配失败时，一个字节被写入到过时指针，远程攻击者通过处理特制图像文件可触发此漏洞，导致拒绝服务。
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 ~ 7.1.2-15 -
ImageMagick ImageMagick 0 ~ 6.9.13-40 -

II. Public POCs for CVE-2026-56376

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III. Intelligence Information for CVE-2026-56376

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Vendor Advisories for CVE-2026-56376 (2)

Same Patch Batch · ImageMagick · 2026-06-23 · 3 CVEs total

CVE-2026-56379 8.1 HIGH ImageMagick - Command Injection via SVG Decoder
CVE-2026-56371 5.3 MEDIUM ImageMagick - Memory Leak in TXT File Processing via Texture Attribute

IV. Related Vulnerabilities

Same product: ImageMagick
Same vendor: ImageMagick
Same weakness: CWE-416