What is CVE-2026-45147?

CVE-2026-45147 is a medium-severity vulnerability in Siyuan-note Siyuan, classified under Improper Authorization. CVSS score: 4.3/10. Published 2026-05-14.

How severe is CVE-2026-45147?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Siyuan-note Siyuan

CVE-2026-45147

SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, POST /api/tag/getTag is registered with model.CheckAuth only, omitting both model.CheckAdminRole and model.CheckReadonly, despite the handler performing a confi…

EPSS: 0.000 (8.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

Affected products

Siyuan-note Siyuan — versions < 3.7.0

Weakness classification (CWE)

CWE-285 — Improper Authorization
CWE-862 — Missing Authorization

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-45147?: CVE-2026-45147 is a medium-severity vulnerability in Siyuan-note Siyuan, classified under Improper Authorization. CVSS score: 4.3/10. Published 2026-05-14.
How severe is CVE-2026-45147?: Medium severity. CVSS v3 base score is 4.3 out of 10.