CVE-2026-100636

HIGHCVSS 7.6

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.

Timeline

Published:September 26th, 2026 2:16 PM

Last modified:September 28th, 2026 5:17 PM

CVSS Scoring

CVSS v3: 7.6 (HIGH)

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

Weaknesses (CWE)

CWE-22

References & Reports

Advisories, patches, and third-party reports

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-jf98-m24w-gm9m
https://www.vulncheck.com/advisories/siyuan-before-3.8.4-path-traversal-via-exportbrowserhtml-folder
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-jf98-m24w-gm9m

Source: NIST NVD · Data may lag official sources by up to one minute