CVE-2026-45733

Trilium: Stored XSS in note icon rendering leads to Remote Code Execution in Electron desktop app

State: Published
Severity: 8.3 High
Published: Aug 18, 2026
Updated: Aug 18, 2026
Reserved: May 13, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	8.3 High	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L	GitHub_M

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-83 Improper Neutralization of Script in Attributes in a Web Page
CWE-693 Protection Mechanism Failure

Affected Products

Product	Versions
TriliumTriliumNext	< 0.103.0Affected

References

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