What is CVE-2026-68587?

CVE-2026-68587 is a high-severity vulnerability in Siyuan-note Siyuan, classified under Missing Authorization. CVSS score: 8.6/10. Published 2026-08-03.

How severe is CVE-2026-68587?

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

Auth bypass in Siyuan-note Siyuan

CVE-2026-68587

SiYuan versions before v3.7.3 contain an information disclosure vulnerability in the getHeadingDeleteTransaction, getHeadingLevelTransaction, and getHeadingInsertTransaction endpoints that return rendered block DOM without publish-access c…

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, 3.7.3

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-2026-68587?: CVE-2026-68587 is a high-severity vulnerability in Siyuan-note Siyuan, classified under Missing Authorization. CVSS score: 8.6/10. Published 2026-08-03.
How severe is CVE-2026-68587?: High severity. CVSS v3 base score is 8.6 out of 10.