CVE-2026-100636
SiYuan before v3.8.4 Path Traversal via exportBrowserHTML folder
CVSS Score
7.6
EPSS Score
0.0%
EPSS Percentile
0th
SiYuan versions before v3.8.4 contain a path traversal vulnerability in the exportBrowserHTML endpoint that allows authenticated administrators to write arbitrary HTML content to index.html outside the workspace directory. Attackers can supply a folder parameter with directory traversal sequences to escape the export directory and overwrite index.html in any pre-existing kernel-writable location, enabling stored XSS or workspace defacement.
| CWE | CWE-22 |
| Vendor | siyuan-note |
| Product | siyuan |
| Published | Sep 26, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
High
Availability
Low
Affected Versions
siyuan-note / siyuan
0 < 3.8.4
References
Credits
🔍 manus-use