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Fencer Vulns
high 7.8

CVE-2026-18300 json

GIMP HDR File Parsing Integer Overflow Remote Code Execution Vulnerability

published 2026-08-20 2 mo ago modified 2026-10-26 14 d ago also EUVD-2026-63449

cvss
7.8
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 26%
public exploits
0
none known

Summary

GIMP HDR File Parsing Integer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GIMP. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of HDR files. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before allocating a buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29289.

Patch / fix

  • gegl Debian 14 1:0.4.72-1

debian advisories DEBIAN-CVE-2026-18300

  • gegl RHEL 8 0.2.0-40.el8_10.1
  • gegl04 RHEL 8 0.4.4-7.el8_10.1
  • gegl04 RHEL 9 0.4.62-1.el9_8.2
  • gegl04-tools RHEL 9 0.4.62-1.el9_8.2
  • gegl04 RHEL 9.2 E4S 0.4.34-2.el9_2.2
  • gegl04-tools RHEL 9.2 E4S 0.4.34-2.el9_2.2
  • gegl04 RHEL 9.4 E4S 0.4.34-3.el9_4.2
  • gegl04-tools RHEL 9.4 E4S 0.4.34-3.el9_4.2

red hat advisories RHSA-2026:85254RHSA-2026:85253RHSA-2026:84575RHSA-2026:62425RHSA-2026:62420RHSA-2026:62170

  • gegl SLE Workstation Extension 15 SP7 0.3.34-150000.3.12.1

suse advisories SUSE-SU-2026:3996-1

  • gegl openSUSE Tumbleweed 0.4.70-2.1
  • gegl openSUSE Leap 16.0 0.4.62-bp160.2.1

opensuse advisories openSUSE-SU-2026:11683-1openSUSE-SU-2026:21731-1

  • gegl04 AlmaLinux 8 0.4.4-7.el8_10.1
  • gegl AlmaLinux 8 0.2.0-40.el8_10.1
  • gegl04 AlmaLinux 9 0.4.62-1.el9_8.2
  • gegl04-tools AlmaLinux 9 0.4.62-1.el9_8.2

almalinux advisories ALSA-2026:62420ALSA-2026:62425ALSA-2026:62170

  • gegl04 Rocky Linux 8 0.4.4-7.el8_10.1
  • gegl Rocky Linux 8 0.2.0-40.el8_10.1
  • gegl04 Rocky Linux 9 0.4.62-1.el9_8.2

rocky linux advisories RLSA-2026:62420RLSA-2026:62425RLSA-2026:62170

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-2026-18300 updated cvss 7.8

gimp: gegl: GIMP: Remote code execution via integer overflow in HDR file parsing

  • Red Hat Enterprise Linux 6 gegl, gimp, gimp-libs, gimp-devel-tools, gimp-help-browser
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 gegl
    affected: workaround, no fix available
  • Red Hat Enterprise Linux 10 gegl04 0.4.62-1.el10_2
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Enterprise Linux AppStream (v. 8) gegl 0.2.0-40.el8_10.1, gegl04 0.4.4-7.el8_10.1
    fixed: vendor fix RHSA-2026:62425
  • Red Hat Enterprise Linux AppStream (v. 9) gegl04 0.4.62-1.el9_8.2, gegl04-tools 0.4.62-1.el9_8.2
    fixed: vendor fix RHSA-2026:62170
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) gegl04 0.4.34-2.el9_2.2, gegl04-tools 0.4.34-2.el9_2.2
    fixed: vendor fix RHSA-2026:85254
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) gegl04 0.4.34-3.el9_4.2, gegl04-tools 0.4.34-3.el9_4.2
    fixed: vendor fix RHSA-2026:85253
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) gegl04 0.4.34-3.el9_6.2, gegl04-tools 0.4.34-3.el9_6.2
    fixed: vendor fix RHSA-2026:84575
show 3 more
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) gegl04-devel 0.4.62-1.el9_8.2, gegl04-debuginfo 0.4.62-1.el9_8.2, gegl04-debugsource 0.4.62-1.el9_8.2, gegl04-tools-debuginfo 0.4.62-1.el9_8.2
    fixed: vendor fix RHSA-2026:62170
  • Red Hat Enterprise Linux CRB (v. 8) gegl04-devel 0.4.4-7.el8_10.1, gegl04-debuginfo 0.4.4-7.el8_10.1, gegl04-debugsource 0.4.4-7.el8_10.1, gegl04-tools-debuginfo 0.4.4-7.el8_10.1
    fixed: vendor fix RHSA-2026:62420
  • Red Hat CodeReady Linux Builder EUS (v.9.6) gegl04-devel 0.4.34-3.el9_6.2, gegl04-debuginfo 0.4.34-3.el9_6.2, gegl04-debugsource 0.4.34-3.el9_6.2, gegl04-tools-debuginfo 0.4.34-3.el9_6.2 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 Red Hat Enterprise Linux 9 gimp, gimp-libs Red Hat Enterprise Linux AppStream EUS (v.9.6) gegl04-debuginfo 0.4.34-3.el9_6.2, gegl04-devel-docs 0.4.34-3.el9_6.2, gegl04-debugsource 0.4.34-3.el9_6.2, gegl04-tools-debuginfo 0.4.34-3.el9_6.2
    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
none
Automatable
no
Technical impact
total
Assessed
2 mo ago

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 7.8 CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • GIMP GIMP

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

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.