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Fencer Vulns
high 7.1

CVE-2026-66759 json

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

published 2026-07-27 3 mo ago modified 2026-11-05 3 d ago also EUVD-2026-49405

cvss
7.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 23%
public exploits
0
none known

Summary

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.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 9 2:3.0.4-4.el9_8.9
  • gimp Debian 13 3.0.4-3+deb13u10
  • gimp Debian 14 3.2.6-1

debian advisories DEBIAN-CVE-2026-66759

  • gimp RHEL 9 2:3.0.4-4.el9_8.9
  • gimp-libs RHEL 9 2:3.0.4-4.el9_8.9

red hat advisories RHSA-2026:50817

  • gimp openSUSE Tumbleweed 3.2.4-3.1
  • gimp openSUSE Leap 16.0 3.0.8-bp160.6.1

opensuse advisories openSUSE-SU-2026:11449-1openSUSE-SU-2026:21521-1

  • gimp AlmaLinux 9 2:3.0.4-4.el9_8.9
  • gimp-libs AlmaLinux 9 2:3.0.4-4.el9_8.9

almalinux advisories ALSA-2026:50817

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-66759 updated cvss 7.1

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

  • Red Hat Enterprise Linux AppStream (v. 9) gimp 3.0.4-4.el9_8.9, gimp-libs 3.0.4-4.el9_8.9
    fixed: vendor fix “To mitigate this vulnerability, do not open ICNS files from untrusted sources with GIMP.” RHSA-2026:50817
  • Red Hat Enterprise Linux 6 gimp, gimp-libs, gimp-devel-tools, gimp-help-browser Red Hat Enterprise Linux 7 gimp, gimp-libs, gimp-devel-tools Red Hat Enterprise Linux 8 gimp, pygtk2, gimp-libs, pygobject2, python2-cairo, pygtk2-codegen, +3 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.30% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • gitlab.gnome.org https://gitlab.gnome.org/GNOME/gimp/-/issues/16528 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Affected products

  • GNOME GIMP
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.