SEPTEMBER 15, 2026
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Case File

CVE-2026-87807

HIGH · CVSS 7.5 EPSS 0.27% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-09 · Last synced 2026-09-15

CyberRota Analysis

AI-Generated

Versions of Siyuan prior to 3.8.2 are vulnerable to an authenticated SQL injection in the fullTextSearchBlock endpoint, specifically through the method=1 query parameter. This flaw allows attackers to execute UNION SELECT statements, enabling them to access the entire blocks table and bypass publish-access controls, thereby exposing sensitive document content and attributes. Organizations using affected versions should prioritize patching to mitigate the risk of data exposure.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-87807
Severity
HIGH
CVSS
7.5
EPSS
0.27%

Original NVD 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.