What is CVE-2026-34453?

CVE-2026-34453 is a high-severity vulnerability in Siyuan-note Siyuan, classified under Incorrect Authorization. CVSS score: 7.5/10. Published 2026-03-31.

How severe is CVE-2026-34453?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Siyuan-note Siyuan

CVE-2026-34453

SiYuan is a personal knowledge management system. Prior to version 3.6.2, the publish service exposes bookmarked blocks from password-protected documents to unauthenticated visitors. In publish/read-only mode, /api/bookmark/getBookmark fil…

Vulnerability class: Broken Access Control

EPSS: 0.036 (88.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Siyuan-note Siyuan — versions < 3.6.2

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-c77m-r996-jr3q (x_refsource_CONFIRM)
https://github.com/siyuan-note/siyuan/issues/17246 (x_refsource_MISC)
https://github.com/siyuan-note/siyuan/releases/tag/v3.6.2 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-34453?: CVE-2026-34453 is a high-severity vulnerability in Siyuan-note Siyuan, classified under Incorrect Authorization. CVSS score: 7.5/10. Published 2026-03-31.
How severe is CVE-2026-34453?: High severity. CVSS v3 base score is 7.5 out of 10.