Vulnerability in Siyuan-Note Siyuan
CVE-2026-72793
SiYuan versions before v3.7.4 fail to mask sensitive configuration fields in the /api/system/getConf endpoint, allowing anonymous or publish-reader users to obtain the session-cookie signing key, OS username via pandoc path, and encrypted-notebook key material. Attackers can forge and tamper with session cookies to impersonate users, and on instances without access-auth codes configured, escalate to administrator privileges.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (32.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.6% 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: +0.002
Affected products
- Siyuan-Note Siyuan — versions 0, 3.7.4
Weakness classification (CWE)
References
- github.com/siyuan-note/siyuan/security/advisories/GHSA-h4v5-crx2-3cv4 (vendor-advisory)
- www.vulncheck.com/advisories/siyuan-before-information-disclosure-via-api-syste… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-72793?
- CVE-2026-72793 is a high-severity vulnerability in Siyuan-Note Siyuan, classified under Insufficiently Protected Credentials. CVSS score: 8.6/10. Published 2026-08-12.
- How severe is CVE-2026-72793?
- High severity. CVSS v3 base score is 8.6 out of 10.