Auth bypass in Siyuan-Note Siyuan
CVE-2026-72795
SiYuan versions before v3.7.4 fail to filter embedded block content by publish access in the getBlockDOMWithEmbed and getBlockDOMsWithEmbed endpoints. Attackers can request published blocks containing embed queries to read content from password-protected, hidden, or forbidden documents without authorization.
Vulnerability class: Broken Access Control
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 (32.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.5% 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-h6w7-xxcf-w2mq (vendor-advisory)
- www.vulncheck.com/advisories/siyuan-before-information-disclosure-via-embed-blo… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-72795?
- CVE-2026-72795 is a high-severity vulnerability in Siyuan-Note Siyuan, classified under Missing Authorization. CVSS score: 8.6/10. Published 2026-08-12.
- How severe is CVE-2026-72795?
- High severity. CVSS v3 base score is 8.6 out of 10.