ImageMagick OOB Heap Write via Multi-Image Read Before 6.9.13-48/7.1.2-23
CVE-2026-46520 Published on June 10, 2026
ImageMagick: Heap Buffer Over-Write in IPL decoder when reading multiple images of different dimensions
ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 6.9.13-48 and 7.1.2-23, when reading multiple images with different dimensions an out of bounds heap write can occur. This issue has been patched in versions 6.9.13-48 and 7.1.2-23.
Vulnerability Analysis
CVE-2026-46520 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Types
Heap-based Buffer Overflow
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().
What is a Memory Corruption Vulnerability?
The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.
CVE-2026-46520 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2026-46520
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Affected Versions
ImageMagick:- Version < 6.9.13-48 is affected.
- Version < 7.1.2-23 is affected.