CVE-2026-72812
Medium
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.
SeverityMedium
CVSS6.5
Exploit probability—
ProductGithub.com/siyuan-note/siyuan/kernel
PublishedAug 14, 2026
First seenAug 14, 2026
Weakness typeCWE-862Missing authorization
How to fix
Update
- github.com/siyuan-note/siyuan/kernel0.0.0-20260723002528-7d273c271ce1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| github.com/siyuan-note/siyuan/kernelGo | v < 0.0.0-20260723002528-7d273c271ce1 | 0.0.0-20260723002528-7d273c271ce1 |
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