CVE-2026-72789

SiYuan before v3.7.4 Authentication Bypass via Encrypted Notebooks

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.

Affected

siyuan-note · siyuan

CVSS v4.0 VULNCHECK

9.2 CRITICALCVSS: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:X/V:X/RE:X/U:X

CVSS v3.1 VULNCHECK

8.6 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

EPSS

0.50% chance of exploitation in the next 30 days, 42nd percentile

Published

2026-08-12

Updated

2026-08-14

Proof-of-concept exploits (1)

• advisories/GHSA-v684-q882-jgmq

References

• CVE Record
• NVD entry