CVE-2026-85583 Details
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.
A path traversal vulnerability has been identified in SiYuan versions prior to 3.8.2. This vulnerability exists in the reader-accessible file-read endpoint, which follows symlinks when accessing authorized asset paths. Attackers with a reader role can exploit this by requesting a logical asset under 'data/assets/' that is a symlink to a file outside the workspace. This allows them to bypass workspace boundary restrictions and access the target file's contents.
Users are advised to update to SiYuan version 3.8.2 or later. In addition, it is recommended to resolve symlinks before authorization and ensure that the resolved paths remain within the allowed workspace or assets root. Applying publish and sensitive-file checks to the resolved paths can further mitigate this vulnerability.
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-g7gf-v79m-jwrm | [email protected] | AdvisoryExploitRemedyVendor |
| https://www.vulncheck.com/advisories/siyuan-before-3.8.2-path-traversal-via-symlink-in-file-api | [email protected] | Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-59 | Improper Link Resolution Before File Access ('Link Following') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| SiYuan | < 3.8.2 (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] |