CVE-2026-72804 SiYuan before v3.7.4 Authentication Bypass via Graph Endpoints
Attackers can bypass authentication on graph endpoints to read password-protected document content and reference topology in SiYuan.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-72804?
CVE-2026-72804 is a critical authentication bypass vulnerability in siyuan-note siyuan, published on 12 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
SiYuan versions before v3.7.4 fail to validate publish-password tier in getGraph and getLocalGraph endpoints, allowing anonymous readers to retrieve block-level content of password-protected documents. Attackers can call these endpoints without supplying a password to read protected document content and the complete reference topology.
Weakness: CWE-200
Which versions are affected by CVE-2026-72804?
3 open source packages ship an affected version, including github.com/siyuan-note/siyuan/kernel.
| Package | Affected | Fixed in |
|---|---|---|
github.com/siyuan-note/siyuan/kernel Go | All versions | 0.0.0-20260724091654-82e9ded423e4 |
github.com/siyuan-note/siyuan/kernel Go | All versions | 0.0.0-20260724091654-82e9ded423e4 |
github.com/siyuan-note/siyuan/kernel Go | All versions | 0.0.0-20260724091654-82e9ded423e4 |
How do I fix CVE-2026-72804?
Upgrade github.com/siyuan-note/siyuan/kernel to 0.0.0-20260724091654-82e9ded423e4 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-72804 being exploited?
There is no known exploitation of CVE-2026-72804 in the wild and no public exploit code.
Sources
Also known as GHSA-vpjw-wf5h-cgpq, GO-2026-6407.