CVE-2026-66395
SiYuan Desktop before v3.7.2 Reflected XSS to RCE via siyuan Protocol
CVSS Score
9.6
EPSS Score
0.0%
EPSS Percentile
0th
SiYuan desktop before v3.7.2 contains a reflected cross-site scripting vulnerability in the bazaar plugin readme handler that allows attackers to execute arbitrary code by crafting a malicious siyuan:// deep link. Attackers can inject HTML payloads via the plugin name parameter that execute with full Node.js access through insertAdjacentHTML rendering in an insecurely configured Electron renderer.
| CWE | CWE-79 |
| Vendor | siyuan-note |
| Product | siyuan |
| Published | Jul 27, 2026 |
| Last Updated | Jul 27, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
siyuan-note / siyuan
0 < 3.7.2
References
Credits
🔍 hypnguyen1209