CVE-2026-105827 ImageMagick CVE debrief

Who should care

Defenders responsible for ImageMagick installations should assess exposure and prioritize verification and updates to prevent potential denial-of-service attacks. This includes verifying and updating ImageMagick installations, implementing input validation and sanitization for CALS images, and monitoring for potential denial-of-service attacks. Defenders should also review compensating controls for exposed systems while remediation is scheduled and verify.

Why it matters

Defenders should prioritize verifying and updating ImageMagick installations to prevent potential denial-of-service attacks due to an uncontrolled recursion vulnerability in the CALS decoder.

• Denial-of-service attacks may occur if vulnerable ImageMagick installations are exploited
• Defenders should verify and update ImageMagick installations to prevent potential attacks
• Uncontrolled recursion in the CALS decoder may lead to stack exhaustion and process crashes

Technical summary

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. This vulnerability can be triggered by a crafted CALS image and can lead to stack exhaustion and process crashes. Defenders should prioritize verifying and updating ImageMagick installations to prevent potential denial-of-service attacks. The vulnerability affects ImageMagick installations and can be exploited by attackers to cause a denial of service. The issue is caused by a missing depth check in the CALS decoder, which can lead to unbounded recursion.

Defensive priority

Defenders should prioritize verifying and updating ImageMagick installations to prevent potential denial-of-service attacks.

Recommended defensive actions

• Verify ImageMagick installations and update to version 7.1.2-30 or later
• Implement input validation and sanitization for CALS images
• Monitor for potential denial-of-service attacks
• 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 vulnerability in ImageMagick before 7.1.2-30 and 6.9.13-55. The NVD entry is currently not provided. Defenders should verify and update ImageMagick installations to prevent potential denial-of-service attacks. The vulnerability is caused by a missing depth check in the CALS decoder, which can lead to unbounded recursion and stack exhaustion.

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.