CVE-2026-91021

State: Published
Severity: 5.4 Medium
Published: Sep 14, 2026
Updated: Sep 14, 2026
Reserved: Sep 14, 2026

Description

Trilium Notes, version v0.103.0 and earlier, contains a stored cross-site scripting (XSS) vulnerability in the share renderer for webView notes due to improper HTML escaping of user-controlled #webViewSrc values. This vulnerability allows attackers with note-authoring privileges to inject arbitrary JavaScript that executes for any user who opens the shared note, including administrators.

Scores

CVSS	Score	Vector	Source
3.1	5.4 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N	CISA-ADP

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
Trillium NotesTrilium	v0.103.0 and earlierAffected

References

https://vokecyber.com/research/trilium-share-renderer-stored-xss

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