CVE-2026-100636
SiYuan before v3.8.4 Path Traversal via exportBrowserHTML folder
- State
- Published
- Severity
- 8.3 High
- Published
- Sep 26, 2026
- Updated
- Sep 28, 2026
- Reserved
- Sep 26, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.3 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L | VulnCheck |
| 3.1 | 7.6 High | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:L | VulnCheck |
Weaknesses
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Products
| Product | Versions |
|---|---|
siyuansiyuan-note |
|
References
- GitHub Security Advisory (GHSA-jf98-m24w-gm9m)vendor-advisory
- VulnCheck Advisory: SiYuan before v3.8.4 Path Traversal via exportBrowserHTML folderthird-party-advisory
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