Vulnerability · Published Aug 20, 2026 · Assigned by zdi
CVE-2026-18300GIMP HDR File Parsing Integer Overflow Remote Code Execution Vulnerability
High 7.8
In plain English
A high-severity integer overflow in GIMP from GIMP. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | gegl | 0.2.0-40.el8_10.1 | ALSA-2026:62425 |
| AlmaLinux:8 | gegl04 | 0.4.4-7.el8_10.1 | ALSA-2026:62420 |
| AlmaLinux:9 | gegl04 | 0.4.62-1.el9_8.2 | ALSA-2026:62170 |
| AlmaLinux:8 | gegl04-devel | 0.4.4-7.el8_10.1 | ALSA-2026:62420 |
| AlmaLinux:9 | gegl04-devel | 0.4.62-1.el9_8.2 | ALSA-2026:62170 |
| AlmaLinux:9 | gegl04-devel-docs | 0.4.62-1.el9_8.2 | ALSA-2026:62170 |
| AlmaLinux:9 | gegl04-tools | 0.4.62-1.el9_8.2 | ALSA-2026:62170 |
| Debian:12 | gegl | no fix listed | DEBIAN-CVE-2026-18300 |
| Debian:13 | gegl | no fix listed | DEBIAN-CVE-2026-18300 |
| Debian:14 | gegl | 1:0.4.72-1 | DEBIAN-CVE-2026-18300 |
| Rocky Linux:8 | gegl | 0:0.2.0-40.el8_10.1 | RLSA-2026:62425 |
| Rocky Linux:8 | gegl04 | 0:0.4.4-7.el8_10.1 | RLSA-2026:62420 |
| Rocky Linux:9 | gegl04 | 0:0.4.62-1.el9_8.2 | RLSA-2026:62170 |
| Ubuntu:26.04:LTS | gimp | no fix listed | UBUNTU-CVE-2026-18300 |
| Ubuntu:26.10 | gimp | no fix listed | UBUNTU-CVE-2026-18300 |
Affected products (as reported)
Weakness: CWE-190 · Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
References
- ZDI-26-453 x_research-advisory
- vendor-provided URL vendor-advisory