Auth bypass in Siyuan-Note Siyuan
CVE-2026-68585
SiYuan versions before v3.7.3 contain a metadata disclosure vulnerability in the /api/block/getBlockInfo endpoint that returns document root metadata including title for publish-forbidden documents without publish-access checks. Anonymous readers or publish RoleReader tokens can supply a block ID to retrieve the title, notebook, path, root ID, and icon of documents administrators marked as excluded from publishing.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.002 (15.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.002 · change: -0.001
Affected products
- Siyuan-Note Siyuan — versions 0, 3.7.3
Weakness classification (CWE)
References
- github.com/siyuan-note/siyuan/security/advisories/GHSA-pm3w-vxp9-ccwc (vendor-advisory)
- www.vulncheck.com/advisories/siyuan-before-metadata-disclosure-via-getblockinfo (third-party-advisory)
Frequently asked questions
- What is CVE-2026-68585?
- CVE-2026-68585 is a medium-severity vulnerability in Siyuan-Note Siyuan, classified under Missing Authorization. CVSS score: 5.8/10. Published 2026-08-03.
- How severe is CVE-2026-68585?
- Medium severity. CVSS v3 base score is 5.8 out of 10.