What is CVE-2026-30926?

CVE-2026-30926 is a high-severity vulnerability in Siyuan-note Siyuan, classified under Improper Access Control. CVSS score: 7.1/10. Published 2026-03-09.

How severe is CVE-2026-30926?

High severity. CVSS v3 base score is 7.1 out of 10.

Auth bypass in Siyuan-note Siyuan

CVE-2026-30926

SiYuan is a personal knowledge management system. Prior to 3.5.10, a privilege escalation vulnerability exists in the publish service of SiYuan Note that allows low-privilege publish accounts (RoleReader) to modify notebook content via the…

EPSS: 0.000 (4.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N.

Affected products

Siyuan-note Siyuan — versions < 3.5.10

Weakness classification (CWE)

CWE-284 — Improper Access Control
CWE-862 — Missing Authorization

References

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-f9cq-v43p-v523 (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-30926?: CVE-2026-30926 is a high-severity vulnerability in Siyuan-note Siyuan, classified under Improper Access Control. CVSS score: 7.1/10. Published 2026-03-09.
How severe is CVE-2026-30926?: High severity. CVSS v3 base score is 7.1 out of 10.