medium6.5
CVE-2026-72812
SiYuan: Missing authorization on refreshBacklink allows anonymous readers to trigger persistent server-side writes and unauthenticated resource amplification (publish mode)
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/siyuan-note/siyuan/kernel | < 0.0.0-20260723002528-7d273c271ce1 | 0.0.0-20260723002528-7d273c271ce1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-wgwx-479j-23vq
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-wgwx-479j-23vq
- https://nvd.nist.gov/vuln/detail/CVE-2026-72812
- https://github.com/siyuan-note/siyuan/commit/7d273c271ce193b9d3ee5751b596b8093ba84ada
- https://www.vulncheck.com/advisories/siyuan-before-missing-authorization-via-refreshbacklink