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TI-2026-38997 Aliases CVE-2026-54066GHSA-p4m3-mgmm-c664

SiYuan: Path Traversal via Double URL Encoding in /assets/*path (publish mode arbitrary file─read)

Priority HIGH 72CWE-1188Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-22 and the CVSS impact.

Summary

SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, the patch for CVE-2026-41894 ("Path Traversal via Double URL Encoding") sanitized the /export/ route but the identical root cause remains in the /assets/*path route. In publish mode (anonymous read-only HTTP endpoint, default port 6808), an unauthenticated remote attacker can read arbitrary files inside WorkspaceDir — including conf/conf.json (which contains the AccessAuthCode SHA256 hash, API token, and sync keys), temp/siyuan.db, temp/blocktree.db, and siyuan.log — by double-URL-encoding .. segments. This vulnerability is fixed in 3.7.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.02175 82nd percentileScored 2026-11-07
Fix Fixed siyuan (siyuan-note): 3.7.0github.com/siyuan-note/siyuan/kernel (Go): 0.0.0-20260628153353-2d5d72223df4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
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 3.7.03.7.0Patch availableCNA
—github.com/siyuan-note/siyuan/kernel (Go)before 0.0.0-20260628153353-2d5d72223df40.0.0-20260628153353-2d5d72223df4Patch availableGHSA-p4m3-mgmm-c664
  • siyuan Vendorsiyuan-note Affected before 3.7.0 Fixed in 3.7.0 Patch available CNA
  • github.com/siyuan-note/siyuan/kernel (Go) Vendor— Affected before 0.0.0-20260628153353-2d5d72223df4 Fixed in 0.0.0-20260628153353-2d5d72223df4 Patch available GHSA-p4m3-mgmm-c664

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 3.7.0
  • Fix · GHSA-p4m3-mgmm-c664 github.com/siyuan-note/siyuan/kernel (Go) Fixed in 0.0.0-20260628153353-2d5d72223df4 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-54066
  2. 2026-10-03 Alias added: GHSA-p4m3-mgmm-c664

References

Advisory 1

Other 2

  • 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

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences