Auth bypass in Siyuan-Note Siyuan
CVE-2026-60083
SiYuan versions before v3.8.0 contain an incomplete path blocklist in the MCP file tool that fails to restrict access to sensitive workspace files protected by the HTTP API. Authenticated administrators can read plaintext publish-mode passwords from data/.siyuan/publishAccess.json and access other sensitive files like data/templates and data/snippets/conf.json.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (30.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 30.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002
Affected products
Weakness classification (CWE)
References
- github.com/siyuan-note/siyuan/security/advisories/GHSA-c8r8-95hg-mp34 (vendor-advisory)
- www.vulncheck.com/advisories/siyuan-before-incomplete-path-blocklist-via-mcp-fi… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-60083?
- CVE-2026-60083 is a medium-severity vulnerability in Siyuan-Note Siyuan, classified under Incorrect Authorization. CVSS score: 4.9/10. Published 2026-08-22.
- How severe is CVE-2026-60083?
- Medium severity. CVSS v3 base score is 4.9 out of 10.