What is CVE-2026-59853?

CVE-2026-59853 is a medium-severity vulnerability in Siyuan-Note Siyuan, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-07-09.

How severe is CVE-2026-59853?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Siyuan-Note Siyuan

CVE-2026-59853

SiYuan is an open-source personal knowledge management system. Prior to 3.7.1, the /api/storage/getCriteria endpoint returns saved search criteria from data/storage/criteria.json without the publish-access filtering used by sibling storage endpoints, allowing a publish-mode Reader to read private document paths, notebook, document, and block IDs, and search and replace keywords for unpublished documents. This issue is fixed in versions 3.7.1.

Vulnerability class: Broken Access Control

EPSS: 0.002 (14.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Siyuan-note Siyuan — versions < 3.7.1

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-59853?: CVE-2026-59853 is a medium-severity vulnerability in Siyuan-Note Siyuan, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-07-09.
How severe is CVE-2026-59853?: Medium severity. CVSS v3 base score is 6.5 out of 10.