Vulnerability · Published Aug 18, 2026 · Assigned by GitHub_M
CVE-2026-45733Trilium: Stored XSS in note icon rendering leads to Remote Code Execution in Electron desktop app
High 8.3
In plain English
A high-severity cross-site scripting in Trilium from TriliumNext. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).
Official description
Trilium Notes is a cross-platform, hierarchical note taking application focused on building large personal knowledge bases. Prior to 0.103.0, the #iconClass label value is returned raw by getNoteIcon() and inserted without HTML attribute encoding into class attributes in apps/client/src/widgets/quick_search.ts and apps/client/src/services/note_autocomplete.ts, allowing a stored payload to execute automatically when a victim opens a new tab or uses Ctrl+J and, because Electron enables nodeIntegration and disables contextIsolation, run operating-system commands as the victim. This issue is fixed in version 0.103.0.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| TriliumNext | Trilium | < 0.103.0 |
Weakness: CWE-79, CWE-83, CWE-693 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L