CVE-2026-18300
GIMP HDR File Parsing Integer Overflow Remote Code Execution Vulnerability
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.
INFO
Published Date :
Aug. 20, 2026, 5:17 p.m.
Last Modified :
Sept. 2, 2026, 2:57 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.0 | HIGH | 99f1926a-a320-47d8-bbb5-42feb611262e | ||||
| CVSS 3.0 | HIGH | [email protected] | ||||
| CVSS 3.0 | HIGH | MITRE-CVE |
Solution
- Update GIMP to the latest version.
- Avoid opening untrusted HDR files.
- Apply vendor security patches promptly.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-18300.
| URL | Resource |
|---|---|
| https://gitlab.gnome.org/GNOME/gegl/-/commit/d3d262008299341c5b032b354021632ceadb2799 | Patch |
| https://www.zerodayinitiative.com/advisories/ZDI-26-453/ | Third Party Advisory Patch |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-18300 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-18300
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-18300 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-18300 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Sep. 02, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:gimp:gimp:3.2.2:*:*:*:*:*:*:* Added Reference Type Zero Day Initiative: https://gitlab.gnome.org/GNOME/gegl/-/commit/d3d262008299341c5b032b354021632ceadb2799 Types: Patch Added Reference Type Zero Day Initiative: https://www.zerodayinitiative.com/advisories/ZDI-26-453/ Types: Patch, Third Party Advisory -
CVE Modified by [email protected]
Aug. 27, 2026
Action Type Old Value New Value Added Reference https://gitlab.gnome.org/GNOME/gegl/-/commit/d3d262008299341c5b032b354021632ceadb2799 Added Reference https://www.zerodayinitiative.com/advisories/ZDI-26-453/ Removed Reference https://gitlab.gnome.org/GNOME/gegl/-/commit/d3d262008299341c5b032b354021632ceadb2799 Removed Reference https://www.zerodayinitiative.com/advisories/ZDI-26-453/ -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 27, 2026
Action Type Old Value New Value Changed SSVC {'id': 'CVE-2026-18300', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-20T00:00:00+00:00'} {'id': 'CVE-2026-18300', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-21T03:57:16.417803Z'} -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 21, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-18300', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-20T00:00:00+00:00'} -
New CVE Received by [email protected]
Aug. 20, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'GIMP', 'product': 'GIMP', 'versions': [{'status': 'affected', 'version': '3.2.2'}], 'defaultStatus': 'unknown'}] Added 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. Added CVSS V3 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Added CWE CWE-190 Added Reference https://gitlab.gnome.org/GNOME/gegl/-/commit/d3d262008299341c5b032b354021632ceadb2799 Added Reference https://www.zerodayinitiative.com/advisories/ZDI-26-453/