siyuan-note SiYuan up to 3.7.2 FileAnnotation getFileAnnotation information disclosure

Summaryinfo

A vulnerability described as problematic has been identified in siyuan-note SiYuan up to 3.7.2. This issue affects some unknown processing of the file /api/asset/getFileAnnotation of the component FileAnnotation. The manipulation results in information disclosure. This vulnerability is cataloged as CVE-2026-72808. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in siyuan-note SiYuan up to 3.7.2. It has been classified as problematic. Affected is an unknown code block of the file /api/asset/getFileAnnotation of the component FileAnnotation. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. CVE summarizes:

SiYuan versions up to and including v3.7.2 (fixed in v3.7.4) contain an information disclosure vulnerability in the /api/asset/getFileAnnotation endpoint, which returns .sya PDF-annotation file content without a publish-access check. Because the endpoint is gated only by CheckAuth (unlike the /assets/* route, which enforces publish access and password), an anonymous reader (when publish authentication is disabled) or any publish RoleReader who knows an asset path can read the private PDF annotations (highlights and notes) of publish-forbidden, password-protected, or unpublished documents. The issue is limited to non-encrypted notebooks; encrypted-box annotations are not exposed.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-72808 since 08/10/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

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

Website

• Product: https://github.com/siyuan-note/siyuan/

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