CVE-2026-33900: ImageMagick has a Heap overflow caused by integer overflow/wraparound in viff encoder on 32-bit builds

Published Apr 13, 2026
·
Updated

ImageMagick is free and open-source software used for editing and manipulating digital images. In versions below both 7.1.2-19 and 6.9.13-44, the viff encoder contains an integer truncation/wraparound issue on 32-bit builds that could trigger an out of bounds heap write, potentially causing a crash. This issue has been fixed in versions 6.9.13-44 and 7.1.2-19.

Other sources

In viff encoder contains an integer truncation/wraparound issue on 32-bit builds that could trigger an out of bounds heap write that can result in a crash.

— GitHub

Affected Software

11 affected componentsFixes available
nuget/magick.net-q8-x86<14.12.0
14.12.0
nuget/magick.net-q8-anycpu<14.12.0
14.12.0
nuget/magick.net-q16-x86<14.12.0
14.12.0
nuget/magick.net-q16-hdri-x86<14.12.0
14.12.0
nuget/magick.net-q16-hdri-anycpu<14.12.0
14.12.0
nuget/magick.net-q16-anycpu<14.12.0
14.12.0
ImageMagick ImageMagick<6.9.13-44
ImageMagick ImageMagick>=7.0.0-0<7.1.2-19
debian/imagemagick<=8:6.9.11.60+dfsg-1.3+deb11u4
8:6.9.11.60+dfsg-1.3+deb11u158:6.9.11.60+dfsg-1.6+deb12u118:6.9.11.60+dfsg-1.6+deb12u128:7.1.1.43+dfsg1-1+deb13u108:7.1.1.43+dfsg1-1+deb13u118:7.1.2.27+dfsg1-1
alpine/imagemagick>=7.0.0-0<7.1.2.19-r0
7.1.2.19-r0
alpine/imagemagick>=7.0.0-0<7.1.2.19-r0
7.1.2.19-r0

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 14.12.0
  2. Upgrade

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

    Fixed in 14.12.0
  3. Upgrade

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

    Fixed in 14.12.0
  4. Upgrade

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

    Fixed in 14.12.0
  5. Upgrade

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

    Fixed in 14.12.0
  6. Upgrade

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

    Fixed in 14.12.0
  7. Upgrade

    Upgrade debian/imagemagick to a version that resolves this vulnerability.

    Fixed in 8:6.9.11.60+dfsg-1.3+deb11u15Fixed in 8:6.9.11.60+dfsg-1.6+deb12u11Fixed in 8:6.9.11.60+dfsg-1.6+deb12u12Fixed in 8:7.1.1.43+dfsg1-1+deb13u10Fixed in 8:7.1.1.43+dfsg1-1+deb13u11Fixed in 8:7.1.2.27+dfsg1-1
  8. Upgrade

    Upgrade alpine/imagemagick to a version that resolves this vulnerability.

    Fixed in 7.1.2.19-r0
  9. Upgrade

    Upgrade ImageMagick to a version that resolves this vulnerability.

    Fixed in 6.9.13-44
  10. Upgrade

    Upgrade ImageMagick to a version that resolves this vulnerability.

    Fixed in 7.1.2-19

Event History

Apr 13, 2026
Advisory Published
via GitHub·07:09 PM
Data Sourced
via GitHub·07:09 PM
DescriptionSeverityWeaknessAffected Software
CVE Published
via MITRE·08:50 PM
Data Sourced
via MITRE·08:50 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·09:16 PM
RemedyDescriptionSeverityWeaknessAffected Software
Data Sourced
via OSV·09:16 PM
DescriptionSeverityAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2026-33900?

CVE-2026-33900 has a high severity rating due to the potential for a heap overflow vulnerability in ImageMagick.

2

How do I fix CVE-2026-33900?

To fix CVE-2026-33900, upgrade ImageMagick to version 7.1.2-19 or 6.9.13-44 or later.

3

What software versions are affected by CVE-2026-33900?

CVE-2026-33900 affects ImageMagick versions below 7.1.2-19 and 6.9.13-44.

4

What type of vulnerability is CVE-2026-33900?

CVE-2026-33900 is characterized as a heap overflow caused by integer overflow/wraparound in the viff encoder.

5

Is CVE-2026-33900 present in both 32-bit and 64-bit builds?

The vulnerability CVE-2026-33900 is present specifically in 32-bit builds of ImageMagick.

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