CVE-2026-33908

Modified Modified - Updated After Analysis

Stack Exhaustion DoS in ImageMagick XML Parsing

Publication date: 2026-04-13

Last updated on: 2026-06-30

Assigner: GitHub, Inc.

Description

ImageMagick is free and open-source software used for editing and manipulating digital images. In versions below both 7.1.2-19 and 6.9.13-44, Magick frees the memory of the XML tree via the `DestroyXMLTree()` function; however, this process is executed recursively with no depth limit imposed. When Magick processes an XML file with deeply nested structures, it will exhaust the stack memory, resulting in a Denial of Service (DoS) attack. This issue has been fixed in versions 6.9.13-44 and 7.1.2-19.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-04-13

Last Modified

2026-06-30

Generated

2026-07-06

AI Q&A

2026-04-14

EPSS Evaluated

2026-07-05

NVD

CVE-2026-33908

EUVD

EUVD-2026-22110

Affected Vendors & Products

Vendor	Product	Version / Range
imagemagick	imagemagick	to 6.9.13-44 (exc)
imagemagick	imagemagick	From 7.0.0-0 (inc) to 7.1.2-19 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-674	The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.
CWE-776	The product uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not properly control the number of recursive definitions of entities.

Attack-Flow Graph

Executive Summary

This vulnerability exists in ImageMagick versions below 7.1.2-19 and 6.9.13-44. The issue occurs because the function DestroyXMLTree() frees the memory of an XML tree recursively without any limit on the depth of recursion. When processing an XML file with deeply nested structures, this can cause the stack memory to be exhausted, leading to a Denial of Service (DoS) condition.

Impact Analysis

The vulnerability can cause a Denial of Service (DoS) attack by exhausting the stack memory when processing specially crafted XML files with deeply nested structures. This means that an attacker could cause the ImageMagick software to crash or become unresponsive, potentially disrupting services or applications that rely on it.

Mitigation Strategies

To mitigate this vulnerability, you should upgrade ImageMagick to version 7.1.2-19 or later, or version 6.9.13-44 or later, where the issue has been fixed.

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