CVE-2026-105826
Received Received - Intake

ImageMagick MAT Decoder Temporary File Size Bypass

Publication date: 2026-10-08

Last updated on: 2026-10-08

Assigner: VulnCheck

Description
ImageMagick before 6.9.13-55 and 7.x before 7.1.2-30 contains a security policy bypass in the MAT decoder, which does not enforce configured temporary file size limits when reading highly compressed data. Attackers can supply a crafted MAT image whose decompressed data is written to temporary files larger than the policy allows, consuming disk resources.

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Meta Information

Published
2026-10-08
Last Modified
2026-10-08
Generated
2026-10-08
AI Q&A
2026-10-08
EPSS Evaluated
N/A
NVD
CVE-2026-105826
EUVD
EUVD-2026-95013

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
ImageMagick ImageMagick 0
ImageMagick ImageMagick 0

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-409 The product does not handle or incorrectly handles a compressed input with a very high compression ratio that produces a large output.

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Executive Summary

This vulnerability is a security policy bypass in ImageMagick's MAT decoder. It allows attackers to supply a specially crafted MAT image with highly compressed data. When ImageMagick decompresses this data, it writes temporary files larger than the configured size limits, consuming excessive disk space.

Detection Guidance

To detect this vulnerability, check the version of ImageMagick installed on your system. Run 'convert --version' or 'magick --version' to see if it is below 7.1.2-30 or 6.9.13-55. Monitor disk usage for unexpected temporary file growth during image processing tasks.

Impact Analysis

This vulnerability can lead to denial of service by filling up disk space with temporary files. It does not require privileges or user interaction to exploit, making it easier for attackers to cause disruption.

Compliance Impact

This vulnerability could indirectly impact compliance with standards like GDPR and HIPAA by enabling denial-of-service conditions through excessive disk resource consumption. Unauthorized temporary file growth may interfere with system operations, potentially affecting data integrity and availability required by these regulations.

Mitigation Strategies

Upgrade ImageMagick to version 7.1.2-30 or later, or 6.9.13-55 or later. Review and enforce temporary file size limits in the security policy configuration. Disable MAT decoder processing if not required.

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