CVE-2026-33900
Integer Overflow in ImageMagick VIFF Encoder Causes Heap Corruption
Publication date: 2026-04-13
Last updated on: 2026-04-17
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| imagemagick | imagemagick | to 6.9.13-44 (exc) |
| imagemagick | imagemagick | From 7.0.0-0 (inc) to 7.1.2-19 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-190 | The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in ImageMagick versions below 7.1.2-189 and 6.9.13-44, specifically in the viff encoder on 32-bit builds. It involves an integer truncation or wraparound issue that can lead to an out of bounds heap write.
Such an out of bounds heap write can potentially cause the program to crash.
The issue has been fixed in versions 6.9.13-44 and 7.1.2-19.
How can this vulnerability impact me? :
The vulnerability can cause ImageMagick to crash due to an out of bounds heap write triggered by the integer truncation/wraparound issue in the viff encoder on 32-bit builds.
This could lead to denial of service if the software is used in an environment where image processing is critical.
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, you should upgrade ImageMagick to version 6.9.13-44 or later, or version 7.1.2-19 or later, where the issue has been fixed.