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TI-2026-51263 Aliases CVE-2026-73054GHSA-c8w8-3pqp-wr83GHSA-hg5w-8ppq-wpjq

SiYuan before v3.7.4 Authentication Bypass via WebSocket

Priority HIGH 77CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
None
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-287.

Summary

SiYuan versions before v3.7.4 contain an authentication bypass vulnerability in the WebSocket endpoint caused by differential parsing of query parameters between authentication exemption and session quarantine checks. Unauthenticated attackers can craft a malicious WebSocket URI with duplicated query parameters to bypass access auth code validation and receive the live kernel event stream including document identifiers, titles, and operation logs.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00408 35th percentileScored 2026-11-07
Fix Fixed siyuan (siyuan-note): 3.7.4github.com/siyuan-note/siyuan/kernel (Go): 0.0.0-20260731131820-67bc300b6ea6

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 3.7.43.7.4Patch availableCNA
—github.com/siyuan-note/siyuan/kernel (Go)before 0.0.0-20260731131820-67bc300b6ea60.0.0-20260731131820-67bc300b6ea6Patch availableGHSA-c8w8-3pqp-wr83
  • 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 0.0.0-20260731131820-67bc300b6ea6 Fixed in 0.0.0-20260731131820-67bc300b6ea6 Patch available GHSA-c8w8-3pqp-wr83

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-c8w8-3pqp-wr83 github.com/siyuan-note/siyuan/kernel (Go) Fixed in 0.0.0-20260731131820-67bc300b6ea6 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

    11 records Highest priority Priority HIGH 8 HIGH, 2 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-51255 SiYuan before v3.7.4 Authentication Bypass via HTTP Basic AuthPriority HIGH 81
    • TI-2026-51262 SiYuan before v3.7.4 Cross-Site Scripting via unicode2EmojiPriority HIGH 76
    • TI-2026-51261 SiYuan before v3.7.4 Stored XSS via Attribute-View Field NamesPriority HIGH 76
    Show all 11 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-73054
  2. 2026-10-03 Alias added: GHSA-hg5w-8ppq-wpjq
  3. 2026-10-23 Alias added: GHSA-c8w8-3pqp-wr83
  4. 2026-10-23 Fix available: Go/github.com/siyuan-note/siyuan/[email protected] · GHSA-c8w8-3pqp-wr83
  5. 2026-10-23 CVSS score added · GHSA-c8w8-3pqp-wr83
  6. 2026-10-23 Weakness changed · GHSA-c8w8-3pqp-wr83
  7. 2026-10-23 5 new references · GHSA-c8w8-3pqp-wr83

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