ImageMagick <6.9.13-48 & <7.1.2-23: JP2 Buffer Overwrite in Heap
CVE-2026-46559 Published on June 10, 2026
ImageMagick: Heap Buffer Over-Write of a single byte in the JP2 encoder
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, an incorrect check in the JP2 will result in an heap buffer over-write of a single byte when specifying certain options. This issue has been patched in versions 6.9.13-48 and 7.1.2-23.
Vulnerability Analysis
CVE-2026-46559 can be exploited with local system 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 small impact on availability.
Weakness Types
What is an off-by-five Vulnerability?
A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.
CVE-2026-46559 has been classified to as an off-by-five vulnerability or weakness.
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-2026-46559 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2026-46559
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Affected Versions
ImageMagick:- Version < 6.9.13-48 is affected.
- Version < 7.1.2-23 is affected.