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PatchSiren cyber security CVE debrief

CVE-2026-86423 ImageMagick CVE debrief

CVE-2026-86423 is a heap-use-after-free vulnerability in ImageMagick's PerlMagick GetList method, which can cause a denial-of-service (crash). The vulnerability affects ImageMagick versions before 7.1.2-30 and 6.9.x before 6.9.13-55. Defenders should assess exposure and prioritize patching vulnerable systems. The CVE record and NVD entry provide details, but additional information on exploitation or affected systems is limited. System administrators and security teams should verify and patch vulnerable installations to prevent potential denial-of-service events.

Vendor
ImageMagick
Product
Unknown
CVSS
MEDIUM 4.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-07
Original CVE updated
2026-09-07
Advisory published
2026-09-07
Advisory updated
2026-09-07

Who should care

Defenders responsible for ImageMagick installations, system administrators, and security teams should assess exposure and prioritize patching vulnerable systems.

Why it matters

CVE-2026-86423 is a medium-severity vulnerability in ImageMagick that can cause system crashes. Defenders should prioritize verifying and patching vulnerable installations to prevent potential denial-of-service events.

  • Potential system crashes leading to denial-of-service
  • Need to verify and patch vulnerable ImageMagick installations
  • Possible impact on system availability and reliability

Technical summary

The GetList method in ImageMagick's PerlMagick contains a heap-use-after-free vulnerability. A crafted call to this method can trigger the use-after-free, resulting in a crash (denial of service). The vulnerability affects ImageMagick versions before 7.1.2-30 and 6.9.x before 6.9.13-55. Defenders should prioritize verifying and patching vulnerable ImageMagick installations to prevent potential crashes. The vulnerability can cause system crashes, and defenders should review system configurations and update vulnerable installations.

Defensive priority

Defenders should prioritize verifying and patching vulnerable ImageMagick installations to prevent potential crashes.

Recommended defensive actions

  • Verify ImageMagick version and apply patches if necessary
  • Review system configurations and update vulnerable installations
  • Monitor system logs for potential crash events

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but additional information on exploitation or affected systems is limited. Defenders should verify ImageMagick versions and apply patches if necessary. The vulnerability can cause system crashes, and defenders should review system configurations and update vulnerable installations. The CVE Program record and NVD detail page offer source-provided CVE metadata and vulnerability assessments. However, further details on the

Sources and references

Verified primary and authoritative sources

  • CVE-2026-86423 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-86423

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-86423 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-86423

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental 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.