CVE-2026-105827
Received Received - Intake

Uncontrolled Recursion in ImageMagick via CALS Decoder

Publication date: 2026-10-08

Last updated on: 2026-10-08

Assigner: VulnCheck

Description
ImageMagick before 7.1.2-30 and 6.9.13-55 contains an uncontrolled recursion vulnerability in the CALS decoder due to a missing depth check. Attackers can supply a crafted CALS image that triggers unbounded recursion, exhausting the stack and crashing the process, resulting in a denial of service.

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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-2026-105827
EUVD
EUVD-2026-95014

Affected Vendors & Products

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

Helpful Resources

Exploitability

CWE
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KEV
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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.

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Executive Summary

This vulnerability is an uncontrolled recursion flaw in ImageMagick's CALS decoder. It occurs because the software fails to check the depth of nested structures in CALS images. Attackers can exploit this by providing a specially crafted image that causes infinite recursion, leading to stack exhaustion and process crashes, resulting in a denial of service.

Detection Guidance

Detecting this vulnerability requires checking the installed ImageMagick version. Use the command 'convert --version' or 'magick --version' to verify if your version is below 7.1.2-30 or 6.9.13-55. If so, the system is vulnerable.

Impact Analysis

This vulnerability can cause system crashes by exhausting the stack when processing malicious CALS images. It requires no privileges or user interaction and can be triggered remotely over a network. The impact includes service disruption due to process termination.

Compliance Impact

This vulnerability causes a denial of service by crashing the ImageMagick process through stack exhaustion, which could disrupt systems processing images. While not directly violating GDPR or HIPAA, such disruptions may impact availability of systems handling personal or health data, potentially leading to compliance issues if critical services are affected.

Mitigation Strategies

Immediately update ImageMagick to version 7.1.2-30 or later for the 7.x branch, or 6.9.13-55 or later for the 6.x branch. If updating is not possible, disable processing of CALS images by removing or restricting access to the CALS decoder module.

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