What is CVE-2026-72789?

CVE-2026-72789 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-2026-72789?

High severity. CVSS v3 base score is 8.6 out of 10.

Auth bypass in Siyuan-note Siyuan

CVE-2026-72789

SiYuan before v3.7.4 fails to properly validate publish access for encrypted notebooks, treating them as publicly accessible by default. Anonymous readers can enumerate and retrieve fully decrypted document content from unlocked encrypted…

Vulnerability class: Broken Access Control

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.

Affected products

Siyuan-note Siyuan — versions 0, 3.7.4

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-72789?: CVE-2026-72789 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-2026-72789?: High severity. CVSS v3 base score is 8.6 out of 10.