CVE-2026-105826 ImageMagick CVE debrief

Who should care

Defenders responsible for ImageMagick installations, security teams, and system administrators should assess exposure and prioritize updates. They should verify and update ImageMagick installations to version 7.1.2-30 or later, assess exposure in their environments, and monitor for potential exploitation attempts. This includes reviewing compensating controls for exposed systems, checking relevant monitoring and logs, and tracking exceptions and retesting.

Why it matters

CVE-2026-105826 is a security policy bypass in ImageMagick's MAT decoder, allowing attackers to consume disk resources. Defenders should prioritize verifying and updating ImageMagick installations, assessing exposure, and monitoring for potential exploitation attempts.

• Verify and update ImageMagick installations to prevent potential disk resource consumption
• Assess exposure in environments using ImageMagick to prevent potential security policy bypass
• Monitor for potential exploitation attempts to prevent potential security incidents

Technical summary

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

Defensive priority

Defenders should prioritize verifying and updating ImageMagick installations to version 7.1.2-30 or later, and assess exposure in their environments.

Recommended defensive actions

• Verify ImageMagick installations and update to version 7.1.2-30 or later
• Assess exposure in environments using ImageMagick
• Monitor for potential exploitation attempts
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and source item provide details on the security policy bypass in ImageMagick's MAT decoder. However, limited information is available on potential exploitation and affected systems. Defenders should verify and update ImageMagick installations to version 7.1.2-30 or later, assess exposure in their environments, and monitor for potential exploitation attempts. The MAT decoder does not enforce configured temporary file size limits when reading highly compressed data, which can lead to temporary files larger than the policy

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.