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SiYuan before v3.8.0 Incomplete Path Blocklist via MCP file tool

Priority LOW 31CWE-863Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-863.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00391 33rd percentileScored 2026-11-07
Fix Fixed siyuan (siyuan-note): 3.8.0github.com/siyuan-note/siyuan/kernel (Go): 0.0.0-20260808051406-3542530c505f

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
siyuan-notesiyuanbefore 3.8.03.8.0Patch availableCNA
—github.com/siyuan-note/siyuan/kernel (Go)before 0.0.0-20260808051406-3542530c505f0.0.0-20260808051406-3542530c505fPatch availableGHSA-c8r8-95hg-mp34
  • siyuan Vendorsiyuan-note Affected before 3.8.0 Fixed in 3.8.0 Patch available CNA
  • github.com/siyuan-note/siyuan/kernel (Go) Vendor— Affected before 0.0.0-20260808051406-3542530c505f Fixed in 0.0.0-20260808051406-3542530c505f Patch available GHSA-c8r8-95hg-mp34

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:*——siyuan-note
  • cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:* Versions — — ·siyuan-note

Remediation

  • Fix · CNA siyuan (siyuan-note) Fixed in 3.8.0
  • Fix · GHSA-c8r8-95hg-mp34 github.com/siyuan-note/siyuan/kernel (Go) Fixed in 0.0.0-20260808051406-3542530c505f Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    siyuan-note siyuan 3.8.0

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-42630 SiYuan before v3.8.0 Secret Exfiltration via http_request URLPriority LOW 31

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-60083
  2. 2026-10-03 Alias added: GHSA-rp7c-4prv-9rrg
  3. 2026-10-27 Alias added: GHSA-c8r8-95hg-mp34

References

  • TI-2026-48492 SiYuan before v3.7.3 SQL Injection via searchDocs CVSS 4.0CRITICAL 9.9
  • TI-2026-48491 SiYuan before v3.7.3 SQL Injection via searchEmbedBlock CVSS 4.0CRITICAL 9.9
  • TI-2026-48490 SiYuan before v3.7.3 SQL Injection via fullTextSearchAssetContent CVSS 4.0CRITICAL 9.9
  • TI-2026-47010 SiYuan before v3.7.2 Unauthenticated Administrator Takeover via MCP CVSS 4.0CRITICAL 10.0
  • TI-2026-26050 SiYuan has directory traversal within its publishing service CVSS 3.1CRITICAL 9.8
  • TI-2026-25256 SiYuan: Authorization Bypass Allows Arbitrary SQL Execution via Search API CVSS 3.1CRITICAL 9.8
See all 242 →

Sources