CVE-2026-87807 Details
Description
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.
A SQL injection vulnerability has been identified in Siyuan versions prior to 3.8.2. This vulnerability exists in the fullTextSearchBlock endpoint, specifically within the method=1 query parameter. The issue allows authenticated attackers to inject UNION SELECT statements, enabling them to read the entire blocks table. This exploitation bypasses publish-access controls, exposing all document content and sensitive attributes.
Users are advised to update to Siyuan version 3.8.2 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 9, 2026CISA-ADP
Assessed Sep 10, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/siyuan-note/siyuan/security/advisories/GHSA-336w-67gx-gx2h | [email protected] | AdvisoryExploitRemedyVendor |
| https://www.vulncheck.com/advisories/siyuan-before-3.8.2-sql-injection-via-fulltextsearchblock | [email protected] | Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-89 | Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| siyuan | <= 3.8.1 (semver) <= 3.8.2-alpha (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 10, 2026 | CVE Modified | CISA-ADP |
| Sep 9, 2026 | New CVE Received | [email protected] |