CVE-2026-91021
MEDIUM
NVD
CVSS Score
5.4
Severity
MEDIUM
Published
Sep 14, 2026
Vendor
unknown
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.