CVE-2026-100636

HighCVSS 7.6/10Last modified Sep 28, 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.

Metrics

CVSS 3.1 7.6/10CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:L

Weakness enumeration

CWE-22

Affected software

No affected versions have been published.

Timeline

Published: Sep 26, 2026
Last modified: Sep 28, 2026
NVD status: Deferred

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