CVE-2026-87807 Siyuan - SQL Injection

Siyuan < v3.8.2 contains an authenticated SQL injection caused by improper sanitization of the method=1 query parameter in fullTextSearchBlock endpoint, letting authenticated attackers read sensitive document content by bypassing access controls.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.45% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
SQL Injection
Impact
Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
9 September 2026
Updated
15 October 2026
Weakness
CWE-89

Vendor fix

Update to version v3.8.2 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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