CVE-2026-18300
Description
A flaw was found in GIMP, specifically within the parsing of High Dynamic Range (HDR) files. This integer overflow vulnerability occurs due to insufficient validation of user-supplied data before memory allocation. A remote attacker could exploit this by convincing a user to open a specially crafted malicious HDR file, leading to arbitrary code execution in the context of the current process.
Mitigation
Users should exercise caution when opening HDR files from untrusted sources. It is recommended to only open HDR files from known and trusted origins to reduce the risk of exploitation. Additionally, consider running GIMP within a sandboxed environment if processing untrusted files is a regular activity.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.8 | N/A | 7.8 |
| Attack Vector | Local | N/A | Local |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | Required | N/A | Required |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | High | N/A | High |
| Integrity Impact | High | N/A | High |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
cve.org: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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