What is CVE-2026-73608?

CVE-2026-73608 is a high-severity vulnerability in Siyuan-note Siyuan, classified under Missing Authorization. CVSS score: 8.6/10. Published 2026-08-13.

How severe is CVE-2026-73608?

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

Auth bypass in Siyuan-note Siyuan

CVE-2026-73608

SiYuan's development branch (endpoint introduced by commit 9b8e8956f, not present in v3.7.3 or master, patched in v3.7.4) contains a missing-authorization vulnerability in the /api/av/getAttributeViewSearchTarget endpoint. The route is reg…

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-2026-73608?: CVE-2026-73608 is a high-severity vulnerability in Siyuan-note Siyuan, classified under Missing Authorization. CVSS score: 8.6/10. Published 2026-08-13.
How severe is CVE-2026-73608?: High severity. CVSS v3 base score is 8.6 out of 10.