CVE-2026-91021
🔶 mediumSummary
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.
CVSS Score
5.4
Medium
EPSS Score
0.1
Exploit Probability
Published Date
2026-09-14
First Seen: 2026-09-16
📊 Relative Risk Intelligence
This CVE is Lower Risk - more severe than 22.2% of all 358,566 vulnerabilities in our database.
#278,834
Below average severity
Severity Percentile
🎯 CISA SSVC Assessment Updated: Sep 14, 2026
🔍 Exploitation Status
None
No known exploits
⚙️ Automatable
NO
Requires human interaction
💥 Technical Impact
Partial
Limited system impact
SSVC data provided by
CISA
Last Modified
2026-09-16
Source
NVD 🔗
CVSS Vector 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CWE IDs (Weakness Types)