CVE-2026-60083: SiYuan before v3.8.0 Incomplete Path Blocklist via MCP file tool

Severity: medium (CVSS 4.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-22 · updated 2026-10-12
Weakness: CWE-863

Description

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.

Affected products

siyuan-note siyuan: before 3.8.0 — fixed in 3.8.0

How to fix

Upgrade to a fixed version: siyuan-note siyuan 3.8.0. Check the vendor advisory for mitigations.

References

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-c8r8-95hg-mp34
https://www.vulncheck.com/advisories/siyuan-before-incomplete-path-blocklist-via-mcp-file-tool

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