Vulnerability Details CVE-2026-66759
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 11.9%
CVSS Severity
CVSS v3 Score 7.1
References
Products affected by CVE-2026-66759
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cpe:2.3:a:gimp:gimp:3.0.8
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cpe:2.3:a:gimp:gimp:3.2.4
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cpe:2.3:o:redhat:enterprise_linux:6.0
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cpe:2.3:o:redhat:enterprise_linux:7.0
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cpe:2.3:o:redhat:enterprise_linux:8.0
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cpe:2.3:o:redhat:enterprise_linux:9.0