CVE-2026-62946: ImageMagick: Integer Overflow in JNX decoder causes heap buffer over-write when processing extremly large files on 32-bit builds

Published Jul 24, 2026
·
Updated

ImageMagick is free and open-source software used for editing and manipulating digital images. In versions prior to both 6.9.13-52 and 7.1.2-27, processing an extremely large JNX file on 32-bit platforms can cause an integer overflow, leading to a heap buffer over-write. This issue has been fixed in versions 6.9.13-52 and 7.1.2-27.

Other sources

When processing an extremely large JNX file on 32-bit platforms an integer overflow will happen that can cause a heap buffer over-write.

— GitHub

Affected Software

8 affected componentsFixes available
nuget/Magick.NET-Q8-x86<14.15.0
14.15.0
nuget/Magick.NET-Q8-AnyCPU<14.15.0
14.15.0
nuget/Magick.NET-Q16-x86<14.15.0
14.15.0
nuget/Magick.NET-Q16-HDRI-x86<14.15.0
14.15.0
nuget/Magick.NET-Q16-HDRI-AnyCPU<14.15.0
14.15.0
nuget/Magick.NET-Q16-AnyCPU<14.15.0
14.15.0
ImageMagick ImageMagick<6.9.13-52
ImageMagick ImageMagick>=7.0.0-0<7.1.2-27

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade nuget/Magick.NET-Q8-x86 to a version that resolves this vulnerability.

    Fixed in 14.15.0
  2. Upgrade

    Upgrade nuget/Magick.NET-Q8-AnyCPU to a version that resolves this vulnerability.

    Fixed in 14.15.0
  3. Upgrade

    Upgrade nuget/Magick.NET-Q16-x86 to a version that resolves this vulnerability.

    Fixed in 14.15.0
  4. Upgrade

    Upgrade nuget/Magick.NET-Q16-HDRI-x86 to a version that resolves this vulnerability.

    Fixed in 14.15.0
  5. Upgrade

    Upgrade nuget/Magick.NET-Q16-HDRI-AnyCPU to a version that resolves this vulnerability.

    Fixed in 14.15.0
  6. Upgrade

    Upgrade nuget/Magick.NET-Q16-AnyCPU to a version that resolves this vulnerability.

    Fixed in 14.15.0
  7. Upgrade

    Upgrade ImageMagick to a version that resolves this vulnerability.

    Fixed in 6.9.13-52
  8. Upgrade

    Upgrade ImageMagick to a version that resolves this vulnerability.

    Fixed in 7.1.2-27

Event History

Jul 24, 2026
Advisory Published
via GitHub·04:20 PM
Data Sourced
via GitHub·04:20 PM
DescriptionSeverityWeaknessAffected Software
Jul 30, 2026
CVE Published
via MITRE·12:06 AM
Data Sourced
via MITRE·12:06 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·12:16 AM
DescriptionSeverityWeaknessAffected Software
Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is the severity of CVE-2026-62946?

CVE-2026-62946 has a medium severity rating of 5.1.

2

What causes the vulnerability CVE-2026-62946?

CVE-2026-62946 is caused by an integer overflow when processing extremely large JNX files on 32-bit platforms.

3

How can I fix CVE-2026-62946?

To fix CVE-2026-62946, update to the latest secure version of Magick.NET that addresses the vulnerability.

4

Which software versions are affected by CVE-2026-62946?

CVE-2026-62946 affects various versions of Magick.NET including Q8-x86, Q8-AnyCPU, Q16-x86, Q16-HDRI-x86, Q16-HDRI-AnyCPU, and Q16-AnyCPU.

5

What could happen if CVE-2026-62946 is exploited?

Exploitation of CVE-2026-62946 could lead to a heap buffer overwrite, potentially allowing for arbitrary code execution.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203