CVE-2026-23876

A flaw was found in ImageMagick. A heap buffer overflow, a type of memory corruption, in the XBM image decoder (ReadXBMImage) allows a remote attacker to write controlled data beyond the allocated memory buffer when processing a maliciously crafted image file. This can lead to arbitrary code execution, information disclosure, or a denial of service. The vulnerability can be triggered by any operation that reads or identifies an image.

This vulnerability is rated Important for Red Hat products as it affects ImageMagick, a widely used image manipulation suite. A heap buffer overflow in the XBM image decoder can be triggered by processing a specially crafted image file, potentially leading to arbitrary code execution or denial of service. Exploitation can occur through common image upload and processing pipelines.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

To reduce the risk associated with this vulnerability, avoid processing untrusted XBM image files with ImageMagick. Implement strict input validation and sanitization for any image files processed by ImageMagick, especially those originating from external or untrusted sources. Deploying ImageMagick within a sandboxed or containerized environment can further limit the impact of a successful exploit by isolating the process and restricting its access to system resources.