CVE-2026-26284: ImageMagick: Heap overflow in pcd decoder leads to out of bounds read.

March 12, 2026

The pcd coder lacks proper boundary checking when processing Huffman-coded data. The decoder contains an function that has an incorrect initialization that could cause an out of bounds read.

==3900053==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x502000003c6c at pc 0x55601b9cc552 bp 0x7ffd904b1f70 sp 0x7ffd904b1f60
READ of size 1 at 0x502000003c6c thread T0

References

github.com/ImageMagick/ImageMagick
github.com/ImageMagick/ImageMagick/security/advisories/GHSA-wrhr-rf8j-r842
github.com/advisories/GHSA-wrhr-rf8j-r842
github.com/dlemstra/Magick.NET/releases/tag/14.10.3
nvd.nist.gov/vuln/detail/CVE-2026-26284

Code Behaviors & Features

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