Is CVE-2026-66759 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-66759 being exploited in the wild.

How severe is CVE-2026-66759?

High severity, with a CVSS score of 7.1, published 27 July 2026.

Which products and versions are affected?

GNOME GIMP 2.99.14 and newer, including 3.0.8 and 3.2.4; Red Hat Red Hat Enterprise Linux 6 affected status; Red Hat Red Hat Enterprise Linux 7 affected status; Red Hat Red Hat Enterprise Linux 8 (gimp:2.8/gimp) affected status; and 1 more.

Is there a fix for CVE-2026-66759?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-66759 attacked?

It is attacked with local access, in a network appliance.

Am I affected by CVE-2026-66759?

Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-66759: GNOME GIMP out-of-bounds read in file-icns plugin

CVE-2026-66759 · Severity: high · CVSS 7.1 · Published 2026-07-27

A vulnerability was found in GIMP, a popular open-source image editor, specifically within its plugin for handling Apple Icon Image (ICNS) files. By tricking a user into opening a specially crafted icon file, an attacker can cause the application to crash or potentially leak sensitive information from the computer's memory. This could lead to a disruption of work or the exposure of data that was previously handled by other applications on the system.

Quick answers

Is CVE-2026-66759 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-66759 being exploited in the wild.
How severe is CVE-2026-66759?: High severity, with a CVSS score of 7.1, published 27 July 2026.
Which products and versions are affected?: GNOME GIMP 2.99.14 and newer, including 3.0.8 and 3.2.4; Red Hat Red Hat Enterprise Linux 6 affected status; Red Hat Red Hat Enterprise Linux 7 affected status; Red Hat Red Hat Enterprise Linux 8 (gimp:2.8/gimp) affected status; and 1 more.
Is there a fix for CVE-2026-66759?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-66759 attacked?: It is attacked with local access, in a network appliance.
Am I affected by CVE-2026-66759?: Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An out-of-bounds read vulnerability exists in the icns_decompress() function within GIMP's file-icns-load.c. The flaw occurs because the plugin fails to verify if the mask data cursor exceeds the allocated resource size when applying a decompressed mask. An attacker can provide a crafted .icns file containing a truncated mask resource, causing the loop to read past the buffer bounds. This results in heap information disclosure, where memory contents are leaked as alpha channel pixel values in the displayed image, or a denial-of-service (SIGSEGV) if the read reaches unmapped memory. This vulnerability is distinct from previous fixes in the same component.

Affected products

GNOME GIMP 2.99.14 and newer, including 3.0.8 and 3.2.4
Red Hat Red Hat Enterprise Linux 6 affected status
Red Hat Red Hat Enterprise Linux 7 affected status
Red Hat Red Hat Enterprise Linux 8 (gimp:2.8/gimp) affected status
Red Hat Red Hat Enterprise Linux 9 affected status

Timeline

2026-06-29: other: Vulnerability reported to GNOME GitLab
2026-07-27: disclosed: CVE published and Red Hat advisory issued

References

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