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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-45733
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-18 15:16:54 UTC
Updated2026-08-18 16:17:08 UTC
DescriptionTrilium 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.

Risk And Classification

Primary CVSS: v3.1 8.3 HIGH from [email protected]

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

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

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.3HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L
3.1CNADECLARED8.3HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
Low

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA TriliumNext Trilium affected < 0.103.0 Not specified

References

ReferenceSourceLinkTags
github.com/TriliumNext/Trilium/commit/c06939448bcc2879fc3c4d328ff7dc63ed... [email protected] github.com
github.com/TriliumNext/Trilium/security/advisories/GHSA-h45q-4qc4-8hhg 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/TriliumNext/Trilium/releases/tag/v0.103.0 [email protected] github.com
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