CVE-2026-85578 Details
Description
SiYuan through 3.8.1 contains an authorization bypass vulnerability in the /api/file/getFile endpoint that allows readers to retrieve files from notebooks explicitly configured as Visible:false. Attackers with reader role can access private workspace files including notebook metadata and internal configuration by knowing the hidden notebook identifier and file path.
An authorization bypass vulnerability has been identified in SiYuan versions through 3.8.1, specifically in the /api/file/getFile endpoint. This vulnerability allows users with reader roles to access files from notebooks that are explicitly set to 'Visible:false'. Exploitation of this flaw enables the retrieval of private workspace files, including notebook metadata and internal configuration, by knowing the hidden notebook identifier and file path.
To address this vulnerability, it is recommended to enforce a visibility check before returning any raw files to read-only roles. Additionally, internal files such as '.siyuan/conf.json' should be denied access regardless of publish visibility. Implementing regression tests for various file types under 'Visible:false' notebooks is also advised.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 4, 2026CISA-ADP
Assessed Sep 14, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/siyuan-note/siyuan/security/advisories/GHSA-8ggq-wq3f-vxrw | [email protected] | AdvisoryExploitRemedyVendor |
| https://www.vulncheck.com/advisories/siyuan-through-3.8.1-authorization-bypass-via-getfile | [email protected] | Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-862 | Missing Authorization | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| SiYuan | <= 3.8.1 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 14, 2026 | CVE Modified | CISA-ADP |
| Sep 4, 2026 | New CVE Received | [email protected] |