Auth bypass in Siyuan-Note Siyuan
CVE-2026-103762
SiYuan before v3.8.5 contains a missing authorization vulnerability in the getRefCreateSavePath, getShorthandSavePath, and getDocCreateSavePath endpoints that allows read-only publish visitors to learn unpublished notebook box IDs. Attackers with read-only or anonymous publish access can POST any open notebook ID to receive the global save-box ID and save-path template, revealing a hidden notebook's existence and creation time.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/siyuan-note/siyuan/security/advisories/GHSA-2mrf-mx66-vv6g (vendor-advisory)
- www.vulncheck.com/advisories/siyuan-before-3.8.5-missing-authorization-in-save-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-103762?
- CVE-2026-103762 is a medium-severity vulnerability in Siyuan-Note Siyuan, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-10-02.
- How severe is CVE-2026-103762?
- Medium severity. CVSS v3 base score is 5.3 out of 10.