# CVE-2026-85583

## Summary

- **CVE ID:** CVE-2026-85583
- **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-59
- **Published:** Sep 4, 2026
- **Last Modified:** Sep 4, 2026

## Description

SiYuan versions before v3.8.2 contain a path traversal vulnerability in the reader-accessible file-read endpoint that follows symlinks when opening authorized asset paths. Attackers with reader role can request a logical asset under data/assets/ that is a symlink to a file outside the workspace and receive the target file bytes, bypassing workspace boundary restrictions.

## Affected Products

- siyuan-note — siyuan (0)
- siyuan-note — siyuan (3.8.2)

## References

- [CNA](https://github.com/siyuan-note/siyuan/security/advisories/GHSA-g7gf-v79m-jwrm)
- [CNA](https://www.vulncheck.com/advisories/siyuan-before-3.8.2-path-traversal-via-symlink-in-file-api)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.48%
- **EPSS Percentile:** 39.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._