CVE-2026-72812

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.

References

https://www.vulncheck.com/advisories/siyuan-before-missing-authorization-via-refreshbacklink

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-wgwx-479j-23vq

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4