CVE-2026-45733 — Trilium: Stored XSS in note icon rendering leads to Remote Code Execution in Electron desktop app
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 retur…
Published: 2026-08-18 · CVSS: 8.3 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7