TI-2026-59924 Aliases CVE-2026-87807 GHSA-9r2h-ghj5-r7hq

siyuan before v3.8.2 SQL Injection via fullTextSearchBlock

MEDIUM 44CWE-89Published 2026-09-09 · Updated 2026-10-08

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-89.

Summary

siyuan versions before v3.8.2 contain an authenticated SQL injection vulnerability in the fullTextSearchBlock endpoint's method=1 query parameter. Attackers can inject UNION SELECT statements to read the entire blocks table, bypassing publish-access controls and exposing all document content and sensitive attributes.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00451 39th percentileScored 2026-11-07

Fix Fixed siyuan (siyuan-note): 3.8.2

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

Vendor	Product	Affected versions	Fixed in	Status	Source
siyuan-note	siyuan	before 3.8.2	3.8.2	Patch available	CNA

siyuan Vendorsiyuan-note Affected before 3.8.2 Fixed in 3.8.2 Patch available CNA

CPE names Threatist (inferred) · 1

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

CPE	Versions	Role	Vendor
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 3.8.2

Fixed in the same release

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

Release · 2026-09-09
siyuan-note siyuan 3.8.2
9 records Highest priority Priority HIGH 5 HIGH, 1 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2026-59930 SiYuan before v3.8.2 Stored XSS via unescaped asset filenamesPriority HIGH 72
- TI-2026-59928 SiYuan before v3.8.2 Stored XSS via notebook template pathsPriority HIGH 72
- TI-2026-59925 SiYuan before v3.8.2 Read-Only Boundary Bypass via fullTextSearchBlockPriority HIGH 71
Show all 9 records →

Timeline

2026-10-02 Threatist record created from CVE-2026-87807
2026-10-03 Alias added: GHSA-9r2h-ghj5-r7hq

References

Advisory 1

GitHub Security Advisory (GHSA-336w-67gx-gx2h)

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