CVE-2026-33900

MEDIUM

ImageMagick has a heap overflow caused by integer overflow/wraparound in viff encoder on 32-bit builds

Published April 13, 2026Updated May 5, 2026Source: osv

Summary

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.

Remediation

Upgrade to the fixed version using your package manager.

NuGet

Update Magick.NET-Q16-HDRI-AnyCPU to 14.12.0 or later

dotnet add package Magick.NET-Q16-HDRI-AnyCPU --version 14.12.0

NuGet

Update Magick.NET-Q16-HDRI-x86 to 14.12.0 or later

dotnet add package Magick.NET-Q16-HDRI-x86 --version 14.12.0

NuGet

Update Magick.NET-Q16-x86 to 14.12.0 or later

dotnet add package Magick.NET-Q16-x86 --version 14.12.0

NuGet

Update Magick.NET-Q16-AnyCPU to 14.12.0 or later

dotnet add package Magick.NET-Q16-AnyCPU --version 14.12.0

NuGet

Update Magick.NET-Q8-AnyCPU to 14.12.0 or later

dotnet add package Magick.NET-Q8-AnyCPU --version 14.12.0

NuGet

Update Magick.NET-Q8-x86 to 14.12.0 or later

dotnet add package Magick.NET-Q8-x86 --version 14.12.0

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (6)

Package	Ecosystem	Affected	Fixed In
Magick.NET-Q16-HDRI-AnyCPU	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+206 more)	14.12.0
Magick.NET-Q16-HDRI-x86	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+206 more)	14.12.0
Magick.NET-Q16-x86	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+225 more)	14.12.0
Magick.NET-Q16-AnyCPU	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+209 more)	14.12.0
Magick.NET-Q8-AnyCPU	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+209 more)	14.12.0
Magick.NET-Q8-x86	nuget	10.0.0, 10.1.0, 11.0.0, 11.1.0 (+225 more)	14.12.0

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CWE-190
Integer OverflowMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 5.9 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Frequently Asked Questions

What is CVE-2026-33900?: ImageMagick has a heap overflow caused by integer overflow/wraparound in viff encoder on 32-bit builds This vulnerability has been assigned a severity rating of MEDIUM (CVSS score: 5.9/10).
How do I check if my project is affected by CVE-2026-33900?: CVE-2026-33900 affects Magick.NET-Q16-HDRI-AnyCPU, Magick.NET-Q16-HDRI-x86 and Magick.NET-Q16-x86 (and 3 more). Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-33900 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

5.9

Exploitation requires specific conditions or has limited impact. Remediate within weeks.

Also Known As

GHSA-v67w-737x-v2c9

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