CVE-2026-72812
MEDIUM
NVD
CVSS Score
6.5
Severity
MEDIUM
Published
Aug 14, 2026
Vendor
unknown
Description
SiYuan versions before v3.7.4 contain a missing authorization vulnerability in the /api/ref/refreshBacklink endpoint that allows anonymous readers to trigger persistent server-side writes. Attackers can invoke the endpoint with an attacker-controlled block ID to flush transaction queues, scan all references globally, and enqueue database writes, bypassing read-only protections and enabling resource amplification attacks.