CVE-2026-100644 SiYuan - SQL Injection

SiYuan < 3.8.4 contains a sql injection caused by unescaped concatenation of the dailyNoteSavePath parameter in the graph query endpoint, letting unauthenticated attackers on published sites with auth disabled extract arbitrary database rows via UNION SELECT.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.34% 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
26 September 2026
Updated
15 October 2026
Weakness
CWE-89

Vendor fix

Update to version 3.8.4 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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