CVE-2026-39846

SiYuan is a personal knowledge management system. Prior to 3.6.4, a malicious note synced to another user can trigger remote code execution in the SiYuan Electron desktop client. The root cause is that table caption content is stored without safe escaping and later unescaped into rendered HTML, creating a stored XSS sink. Because the desktop renderer runs with nodeIntegration enabled and contextIsolation disabled, attacker-controlled JavaScript executes with access to Node.js APIs. In practice, an attacker can import a crafted note into a synced workspace, wait for the victim to sync, and achieve code execution when the victim opens the note. This vulnerability is fixed in 3.6.4.

• CWE-79
• CWE-94
• CWE-79

• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-phhp-9rm9-6gr2Exploit, Vendor Advisory
• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-phhp-9rm9-6gr2Exploit, Vendor Advisory

Published

Apr 7, 2026

Last Modified

Jul 20, 2026

Status

Analyzed

• 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.

• CVE-2026-39840Improper neutralization of input during web page generation …6.1
• CVE-2026-39841Improper neutralization of Script-Related HTML tags in a web…6.1
• CVE-2026-39842OpenRemote is an open-source IoT platform. Versions 1.21.0 a…9.9
• CVE-2026-39843Plane is an an open-source project management tool. From 0.2…7.7
• CVE-2026-39844NiceGUI is a Python-based UI framework. Prior to 3.10.0, Sin…7.5
• CVE-2026-39845Weblate is a web based localization tool. In versions prior …4.1
• CVE-2026-39847Emmett is a full-stack Python web framework designed with si…7.5
• CVE-2026-39848Dockyard is a Docker container management app. Prior to 1.1.…5.4
• CVE-2026-39849Pi-hole FTL is the core engine of the Pi-hole network-level …8.8
• CVE-2026-3985The Creative Mail – Easier WordPress & WooCommerce Email Mar…7.5
• CVE-2026-39850Yii 2 is a PHP application framework. Versions 2.0.54 and pr…7.4
• CVE-2026-39851Saleor is an e-commerce platform. From 2.10.0 to before 3.23…4.3