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TI-2026-52566 Aliases CVE-2026-74802GHSA-3cc2-h3v6-rqpq

SiYuan 3.7.3 Cross-Site WebSocket Hijacking via network proxy

Priority MEDIUM 64CWE-346Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-346 and CWE-352.

Summary

SiYuan versions before 3.7.4 contain a cross-site WebSocket hijacking vulnerability in the admin-only /ws/network/proxy endpoint that explicitly disables origin validation by setting CheckOrigin to unconditionally return true. Attackers can craft malicious webpages that establish WebSocket connections to this endpoint and direct the SiYuan kernel process to proxy arbitrary network traffic to attacker-chosen targets, enabling authenticated network pivoting through the victim's machine.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00164 5th percentileScored 2026-11-08
Fix Fixed siyuan (siyuan-note): 3.7.4github.com/siyuan-note/siyuan/kernel (Go): 0.0.0-20260803045322-cb67e0b4fab5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
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 3.7.43.7.4Patch availableCNA
—github.com/siyuan-note/siyuan/kernel (Go)before 0.0.0-20260803045322-cb67e0b4fab50.0.0-20260803045322-cb67e0b4fab5Patch availableGHSA-3cc2-h3v6-rqpq
  • siyuan Vendorsiyuan-note Affected before 3.7.4 Fixed in 3.7.4 Patch available CNA
  • github.com/siyuan-note/siyuan/kernel (Go) Vendor— Affected before 0.0.0-20260803045322-cb67e0b4fab5 Fixed in 0.0.0-20260803045322-cb67e0b4fab5 Patch available GHSA-3cc2-h3v6-rqpq

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 3.7.4
  • Fix · GHSA-3cc2-h3v6-rqpq github.com/siyuan-note/siyuan/kernel (Go) Fixed in 0.0.0-20260803045322-cb67e0b4fab5 Advisory →

Fixed in the same release

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

  • Release ·

    siyuan-note siyuan 3.7.4

    7 records Highest priority Priority HIGH 3 HIGH, 3 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-52563 SiYuan before 3.7.4 Unauthenticated Debug Endpoint Information DisclosurePriority HIGH 79
    • TI-2026-52562 SiYuan kernel Path Traversal via database_clean MCP toolPriority HIGH 75
    • TI-2026-52565 SiYuan before 3.7.4 Local Privilege Escalation via elevator.exePriority HIGH 72
    Show all 7 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-74802
  2. 2026-10-03 Alias added: GHSA-3cc2-h3v6-rqpq

References

Advisory 2

Other 3

  • 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