Auth bypass in Siyuan-Note Siyuan
CVE-2026-86192
SiYuan versions before v3.8.2 fail to properly filter private attribute-view cell values in the getAttributeViewKeys endpoint. Publish readers can retrieve hidden KeyValues payloads from rows bound to inaccessible documents, exposing private database contents without authorization.
Vulnerability class: IDOR (Insecure Direct Object Reference)
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: 0.004 (27.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 27.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/siyuan-note/siyuan/security/advisories/GHSA-vc7j-5f5p-3x75 (vendor-advisory)
- www.vulncheck.com/advisories/siyuan-before-3.8.2-information-disclosure-via-att… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-86192?
- CVE-2026-86192 is a medium-severity vulnerability in Siyuan-Note Siyuan, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-09-05.
- How severe is CVE-2026-86192?
- Medium severity. CVSS v3 base score is 6.5 out of 10.