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Vulnerabilities CVE-2026-66759

CVE-2026-66759

High
Open
TLP:CLEAR

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

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Description

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 icns_decompress function continues reading past the bounds of the buffer. This out-of-bounds read vulnerability results in information disclosure of heap contents, where memory contents are leaked as alpha channel pixel values, or a crash leading to a denial of service if unmapped memory is accessed.

Details

CVSS Score
7.1
EPSS Score
0.21%

12.1th percentile

CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
Confidence
90%
Published
Jul 27, 2026
Last Modified
Aug 24, 2026
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