CVE-2026-56376

Analyzed Analyzed - Analysis Complete

Heap Use-After-Free in ImageMagick

Publication date: 2026-06-23

Last updated on: 2026-06-24

Assigner: VulnCheck

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-06-23

Last Modified

2026-06-24

Generated

2026-07-14

AI Q&A

2026-06-23

EPSS Evaluated

2026-07-12

NVD

CVE-2026-56376

EUVD

EUVD-2026-38440

Affected Vendors & Products

Vendor	Product	Version / Range
imagemagick	imagemagick	to 6.9.13-40 (exc)
imagemagick	imagemagick	From 7.0.0-0 (inc) to 7.1.2-15 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-416	The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

Executive Summary

This vulnerability is a heap use-after-free flaw in ImageMagick's meta coder that occurs when memory allocation fails. Specifically, a single byte is written to a stale pointer, which means memory that has already been freed is accessed incorrectly.

Remote attackers can exploit this vulnerability by processing specially crafted image files, which can cause a denial of service or potentially allow arbitrary code execution.

The issue affects ImageMagick versions before 7.1.2-15 and 6.9.13-40 and is tracked under CWE-416 (Use After Free).

Impact Analysis

This vulnerability can impact you by allowing remote attackers to cause a denial of service on systems running vulnerable versions of ImageMagick.

In some cases, it may also allow attackers to execute arbitrary code, potentially compromising the affected system.

Exploitation requires no privileges or user interaction, making it easier for attackers to trigger the flaw remotely by processing malicious image files.

Mitigation Strategies

To mitigate this vulnerability, you should update ImageMagick to a patched version.

Upgrade to ImageMagick version 7.1.2-15 or later.
Alternatively, upgrade to ImageMagick version 6.9.13-40 or later if using the 6.x branch.

These updates address the heap use-after-free vulnerability in the meta coder that can be exploited by processing specially crafted image files.

Compliance Impact

The provided information does not specify any direct impact of this vulnerability on compliance with common standards and regulations such as GDPR or HIPAA.

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