SEPTEMBER 17, 2026
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Case File

CVE-2026-91021

MEDIUM · CVSS 5.4 EPSS 0.14%

Source: NVD + CISA KEV + EPSS · Published 2026-09-14 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

Trilium Notes versions v0.103.0 and earlier are vulnerable to a stored cross-site scripting (XSS) flaw in the share renderer for webView notes, stemming from inadequate HTML escaping of user-controlled #webViewSrc values. This vulnerability enables attackers with note-authoring privileges to inject malicious JavaScript, which can execute in the context of any user accessing the shared note, potentially impacting administrators as well. Organizations using this software should prioritize patching to mitigate the risk of unauthorized script execution.

CVE
CVE-2026-91021
Severity
MEDIUM
CVSS
5.4
EPSS
0.14%
Java

Original NVD 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.