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Vulnerability record · CVE-2026-66759 · published 27 July 2026

CVE-2026-66759: Gimp out-of-bounds read vulnerability

Gimp · Gimp

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.

7.1 CVSS 3.1 High EPSS 0.31% · top 79.1% CWE-125 · Out-of-bounds read
7.1CVSS 3.1 base score
0.31%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
5References, 2 tagged exploit
24 Aug 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/errata/RHSA-2026:50817 Issue Tracking
https://access.redhat.com/security/cve/CVE-2026-66759 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2507557 Issue TrackingVendor Advisory
https://gitlab.gnome.org/GNOME/gimp/-/issues/16528 ExploitIssue TrackingVendor Advisory
https://gitlab.gnome.org/GNOME/gimp/-/issues/16528 ExploitIssue TrackingVendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-66759), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.