# CVE-2026-85578

## Summary

- **CVE ID:** CVE-2026-85578
- **Severity:** HIGH
- **CVSS Score:** 7.1 (CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-862
- **Published:** Sep 4, 2026
- **Last Modified:** Sep 14, 2026

## 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.

## Affected Products

- siyuan-note — siyuan (0)

## References

- [CNA](https://github.com/siyuan-note/siyuan/security/advisories/GHSA-8ggq-wq3f-vxrw)
- [CNA](https://www.vulncheck.com/advisories/siyuan-through-3.8.1-authorization-bypass-via-getfile)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.27%
- **EPSS Percentile:** 20.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-19._