CVE-2026-73608 SiYuan v3.7.4-alpha.2 Authorization Bypass via getAttributeViewSearchTarget
An anonymous attacker can bypass authorization checks to read restricted database rows in SiYuan's development branch via a specific API endpoint.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-73608?
CVE-2026-73608 is a critical missing authorization vulnerability in siyuan-note siyuan, published on 13 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
SiYuan's development branch (endpoint introduced by commit 9b8e8956f, not present in v3.7.3 or master, patched in v3.7.4-alpha.3) contains a missing-authorization vulnerability in the /api/av/getAttributeViewSearchTarget endpoint. The route is registered with CheckAuth only and performs no authorization checks (no CheckReadonly, no publish-access or encrypted-notebook gating). Given a database identifier taken from a published page and a keyword, an anonymous reader can query the endpoint to retrieve matching database row content, including rows that publish filters (FilterAttributeViewByPublishAccess) would otherwise withhold. No released stable version is affected.
Weakness: CWE-862
Which versions are affected by CVE-2026-73608?
How do I fix CVE-2026-73608?
No fix has been published for CVE-2026-73608 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-73608 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-73608 exists.