CVE-2026-40169
Heap Out-of-Bounds Write in ImageMagick YAML/JSON Output Causes Crash
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 7.1.2-19 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-122 | A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). |
| CWE-787 | The product writes data past the end, or before the beginning, of the intended buffer. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in ImageMagick versions below 7.1.2-19. It occurs when a specially crafted image is processed to produce yaml or json output, which can cause an out of bounds heap write. This means that the program writes data outside the allocated memory boundaries, leading to a crash.
How can this vulnerability impact me? :
The vulnerability can cause the ImageMagick application to crash when handling certain crafted images. This can lead to denial of service (DoS) conditions, where the software becomes unavailable or unstable during image processing.
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, you should upgrade ImageMagick to version 7.1.2-19 or later, where the issue has been fixed.