Vulnerability in Siyuan-Note Siyuan
CVE-2026-85583
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.006 (49.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.002
Affected products
Weakness classification (CWE)
References
- github.com/siyuan-note/siyuan/security/advisories/GHSA-g7gf-v79m-jwrm (vendor-advisory)
- www.vulncheck.com/advisories/siyuan-before-3.8.2-path-traversal-via-symlink-in-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-85583?
- CVE-2026-85583 is a medium-severity vulnerability in Siyuan-Note Siyuan, classified under Improper Link Resolution Before File Access. CVSS score: 6.5/10. Published 2026-09-04.
- How severe is CVE-2026-85583?
- Medium severity. CVSS v3 base score is 6.5 out of 10.