CVE-2026-91021
Last modified
CVE-2026-91021 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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.. EPSS estimates a 0.14% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Trilium | Trillium Notes | <= v0.103.0 |
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2026-91021?
How severe is CVE-2026-91021?
How do I fix CVE-2026-91021?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-91016The Motors WordPress plugin before 1.4.121 does not verify …5.3
- CVE-2026-91017The Robokassa payment gateway for Woocommerce WordPress plug…3.7
- CVE-2026-91018lwIP (Lightweight IP) has a double free vulnerability, which…8.8
- CVE-2026-91019The Event Booking Manager for WooCommerce WordPress plugin …4.9
- CVE-2026-9102A path traversal vulnerability exists in the Altium Enterpri…9.4
- CVE-2026-91020The WebToffee Gift Cards for WooCommerce WordPress plugin be…5.3
- CVE-2026-91022The Motors WordPress plugin before 1.4.124 does not sanitis…6.8
- CVE-2026-91023The Motors WordPress plugin before 1.4.124 does not properl…3.1
- CVE-2026-91024The Booking Manager WordPress plugin before 2.1.21 does not…6.8
- CVE-2026-91025The Booking Manager WordPress plugin before 2.1.21 does not…4.3
- CVE-2026-9103IBM Langflow OSS 1.0.0 through 1.10.0 could allow a remote a…9.8
- CVE-2026-91039Authentication Bypass by Spoofing vulnerability in team-alem…9.1
Are you affected by CVE-2026-91021?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST