CVE-2026-66759 Gimp: out-of-bounds read in file-icns plugin causes information disclosure or crash on crafted icns images

A flaw was found in the file-icns plugin in GIMP. When applying a decompressed mask during ICNS image processing, the plugin reads from the mask data buffer without verifying if the cursor exceeds the allocated resource size. If a crafted file contains a truncated mask resource, the icnsdecompres...

CVE-2026-66759

The CVE-2026-66759 vulnerability affects GIMP’s file-icns plugin. During ICNS image processing, applying a decompressed mask may cause an out-of-bounds read when the plugin reads the mask data buffer without verifying cursor bounds. If a crafted file contains a truncated mask resource, the icns_d...