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Vulnerability record · CVE-2026-72789 · published 12 August 2026

CVE-2026-72789: Missing authorization vulnerability

SiYuan before v3.7.4 fails to properly validate publish access for encrypted notebooks, treating them as publicly accessible by default. Anonymous readers can enumerate and retrieve fully decrypted document content from unlocked encrypted notebooks through the publish API without authentication or key material.

9.2 CVSS 4.0 Critical EPSS 0.50% · top 59.4% CWE-862 · Missing authorization Deferred
9.2CVSS 4.0 base score
0.50%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
26 Aug 2026Last modified by NVD

Description

SiYuan before v3.7.4 fails to properly validate publish access for encrypted notebooks, treating them as publicly accessible by default. Anonymous readers can enumerate and retrieve fully decrypted document content from unlocked encrypted notebooks through the publish API without authentication or key material.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-v684-q882-jgmq
https://www.vulncheck.com/advisories/siyuan-before-authentication-bypass-via-encrypted-notebooks
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-v684-q882-jgmq

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Source: NIST National Vulnerability Database (record CVE-2026-72789), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.