rootpwn

high · CVSS v3 7.6 · CVSS v4 8.3

CVE-2026-100636

SiYuan versions before v3.8.4 contain a path traversal vulnerability in the exportBrowserHTML endpoint that allows authe…

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

Severity
high
CVSS v2
6.8
CVSS v3
7.6
CVSS v4
8.3
EPSS
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