Vulnerability record · CVE-2026-45733 · published 18 August 2026

CVE-2026-45733: Cross-site scripting vulnerability

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.

8.3 CVSS 3.1 High EPSS 0.43% · top 64.9% CWE-79 · Cross-site scriptingCWE-83 · CWE-83 Deferred

8.3CVSS 3.1 base score

0.43%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

4References

18 Sep 2026Last modified by NVD

Description

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L

References

Link	Tags
https://github.com/TriliumNext/Trilium/commit/c06939448bcc2879fc3c4d328ff7dc63ed6b5009
https://github.com/TriliumNext/Trilium/releases/tag/v0.103.0
https://github.com/TriliumNext/Trilium/security/advisories/GHSA-h45q-4qc4-8hhg
https://github.com/TriliumNext/Trilium/security/advisories/GHSA-h45q-4qc4-8hhg

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Source: NIST National Vulnerability Database (record CVE-2026-45733), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.