Signal is active with 2 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
SiYuan is an open-source personal knowledge management system. Prior to 3.6.5, SiYuan desktop renders notification messages as raw HTML inside an Electron renderer. The notification route POST /api/notification/pushMsg accepts a user-controlled msg value, forwards it through the backend broadcast layer, and the frontend inserts it into the DOM with insertAdjacentHTML(...) at message.ts. On desktop builds, this is not limited to ordinary XSS. Electron windows are created with nodeIntegration: true, contextIsolation: false, and webSecurity: false at main.js. As a result, JavaScript executed from the notification sink can directly access Node APIs and escalate to desktop code execution. This vulnerability is fixed in 3.6.5.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
STABLE
| Date | Total | Labels |
|---|
| 2026-04-24 | 1 | Disclosure1 |
| 2026-04-25 | 1 | Disclosure1 |
| 2026-05-22 | 2 | Disclosure2 |
CVE-2026-41421 is a high-severity vulnerability (CVSS 8.8) in SiYuan, a popular open-source personal knowledge management system. The flaw allows remote code execution on desktop builds through a simple HTML injection attack vector in notification messages. Affected…
Post summary
High‑severity RCE in SiYuan disclosed, with technical details but no PoC, exploit code, or patch info.
41421 is — SiYuan Electron RCE: How HTML Injection Became Desktop Code Execution (CVE-2026-41421). CVE-2026-41421 is a high-severity vulnerability CVSS 8.8 in SiYuan, a popular open-source personal knowledge management system.
Post summary
The post announces CVE‑2026‑41421, a high‑severity RCE in SiYuan Electron, but provides no PoC, exploit, patch, or evidence of active exploitation.
CVE-2026-41421 SiYuan is an open-source personal knowledge management system. Prior to 3.6.5, SiYuan desktop renders notification messages as raw HTML inside an Electron renderer. T… https://www.cve.org/CVERecord?id=CVE-2026-41421
Post summary
The post announces CVE‑2026‑41421, noting that SiYuan desktop renders notifications as raw HTML within an Electron renderer, implying an XSS vulnerability. No PoC, exploit, patch, or active exploitation is mentioned.
CVE-2026-41421 Cross-Site Scripting to Remote Code Execution in SiYuan Desktop Before 3.6.5 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-41421
Post summary
The post announces CVE-2026-41421, describing a XSS-to-RCE flaw in SiYuan Desktop, but provides no PoC, exploit code, active usage or patch information.