CVE-2026-33899
Out-of-Bounds Write in ImageMagick XML Parsing
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-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-191 | The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result. |
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. When the software parses an XML file, it may write a single zero byte out of the intended memory bounds. This is a form of out-of-bounds write error.
How can this vulnerability impact me? :
The vulnerability can lead to an out-of-bounds write of a zero byte, which may cause application instability or crashes. According to the CVSS score (5.3), it has a low to medium impact and does not affect confidentiality or integrity but can affect availability.
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, or version 6.9.13-44 or later, as these versions contain the fix for the issue.