Duplicate Advisory: SiYuan: MCP file tool's blocklist is incomplete relative to the HTTP file API it claims to align…

Severity: medium · CVSS 4.9 · Published 2026-08-22

## Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-c8r8-95hg-mp34. This link is maintained to preserve external references.

## Original 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.

Technologies: github.com/siyuan-note/siyuan (Go). Vendors: Go.

Quick answers

Is This vulnerability exploited in the wild?
No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.
How severe is This vulnerability?
Medium severity, with a CVSS score of 4.9, published 22 August 2026.
Which products and versions are affected?
github.com/siyuan-note/siyuan (Go) < 3.8.0, SEMVER:introduced=0.
Is there a fix for This vulnerability?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected?
Check whether you run github.com/siyuan-note/siyuan (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • github.com/siyuan-note/siyuan (Go) < 3.8.0, SEMVER:introduced=0

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