Siyuan Note SiYuan up to 3.7.3 getAttributeViewSearchTarget improper authorization

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Siyuan Note SiYuan up to 3.7.3. Impacted is an unknown function of the file /api/av/getAttributeViewSearchTarget. This manipulation causes improper authorization. This vulnerability appears as CVE-2026-73608. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in Siyuan Note SiYuan up to 3.7.3. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the file /api/av/getAttributeViewSearchTarget. The manipulation with an unknown input leads to a improper authorization vulnerability. The CWE definition for the vulnerability is CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect confidentiality. The summary by CVE is:

SiYuan's development branch (endpoint introduced by commit 9b8e8956f, not present in v3.7.3 or master, patched in v3.7.4) 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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-73608 since 08/13/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1548.002 according to MITRE ATT&CK.

Upgrading to version 3.7.4 eliminates this vulnerability.

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Productinfo

Vendor

• Siyuan Note

Name

• SiYuan

Version

• 3.7.0
• 3.7.1
• 3.7.2
• 3.7.3

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