What is GHSA-mcx7-cgpm-84c8?

GHSA-mcx7-cgpm-84c8 is a security advisory published by GitHub Security Advisories with High severity. SiYuan versions before v3.8.4 contain a path traversal vulnerability in the exportBrowserHTML...

Which CVE IDs does GHSA-mcx7-cgpm-84c8 cover?

GHSA-mcx7-cgpm-84c8 covers the following CVE IDs: CVE-2026-100636. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-mcx7-cgpm-84c8?

GHSA-mcx7-cgpm-84c8 has a CVSS v3 base score of 7.6, published by GitHub Security Advisories.

GHSA-mcx7-cgpm-84c8HighCVSS 7.6

SiYuan versions before v3.8.4 contain a path traversal vulnerability in the exportBrowserHTML...

Vendor

GitHub Security Advisories

Published

September 26, 2026

Last Modified

September 26, 2026

🔗 CVE IDs covered (1)

CVE-2026-100636 →

📋 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.

🔗 References (4)

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-jf98-m24w-gm9m
https://nvd.nist.gov/vuln/detail/CVE-2026-100636
https://www.vulncheck.com/advisories/siyuan-before-3.8.4-path-traversal-via-exportbrowserhtml-folder
https://github.com/advisories/GHSA-mcx7-cgpm-84c8