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TI-2026-48326 Aliases CVE-2026-68586GHSA-36v8-mpjm-8j5r

SiYuan before v3.7.3 Content Disclosure via getBacklinkDoc

Priority MEDIUM 46CWE-862Published · 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-862.

Summary

SiYuan before v3.7.3 fails to apply publish-access filters to the getBacklinkDoc and getBackmentionDoc content endpoints (/api/ref/getBacklinkDoc and /api/ref/getBackmentionDoc). While the corresponding backlink list endpoints filter publish-forbidden documents, the content endpoints (gated only by CheckAuth) do not. A publish-mode reader — including an anonymous reader when publish Basic Auth is disabled — can call these endpoints directly with a publish-forbidden document's ID to retrieve its rendered DOM content and to determine whether the document references a given block (a reference-existence oracle).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00409 35th percentileScored 2026-11-07
Fix Fixed siyuan (siyuan-note): 3.7.3github.com/siyuan-note/siyuan/kernel (Go): 0.0.0-20260721014413-f45749a7ef6e

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
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 3.7.33.7.3Patch availableCNA
—github.com/siyuan-note/siyuan/kernel (Go)before 0.0.0-20260721014413-f45749a7ef6e0.0.0-20260721014413-f45749a7ef6ePatch availableGHSA-36v8-mpjm-8j5r
  • siyuan Vendorsiyuan-note Affected before 3.7.3 Fixed in 3.7.3 Patch available CNA
  • github.com/siyuan-note/siyuan/kernel (Go) Vendor— Affected before 0.0.0-20260721014413-f45749a7ef6e Fixed in 0.0.0-20260721014413-f45749a7ef6e Patch available GHSA-36v8-mpjm-8j5r

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 3.7.3
  • Fix · GHSA-36v8-mpjm-8j5r github.com/siyuan-note/siyuan/kernel (Go) Fixed in 0.0.0-20260721014413-f45749a7ef6e Advisory →

Fixed in the same release

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

  • Release ·

    siyuan-note siyuan 3.7.3

    8 records Highest priority Priority HIGH 6 HIGH, 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-48492 SiYuan before v3.7.3 SQL Injection via searchDocsPriority HIGH 82
    • TI-2026-48491 SiYuan before v3.7.3 SQL Injection via searchEmbedBlockPriority HIGH 82
    • TI-2026-48490 SiYuan before v3.7.3 SQL Injection via fullTextSearchAssetContentPriority HIGH 82
    Show all 8 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-68586
  2. 2026-10-03 Alias added: GHSA-36v8-mpjm-8j5r

References

Advisory 2

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