CVE-2026-72809

creationtimestamp| type| source ---|---|--- 2026-09-04 00:35:29+00:00| published-proof-of-concept| https://github.com/advisories/GHSA-3mp7-4rh5-jrv9 2026-09-04 09:32:48+00:00| seen| https://gist.github.com/alon710/942448215c158ca42cd356ec66bc6d93...

GHSA-3MP7-4RH5-JRV9 SiYuan: Localhost-trust admin bypass on auth-code-gated endpoints, with potential remote reachability via the fixed-port proxy

CVE: This vulnerability corresponds to CVE-2026-72809. Summary The kernel's CheckAuth grants RoleAdministrator to any request whose RemoteAddr is loopback 127.0.0.1, for a specific set of endpoints, and these localhost bypasses sit outside the accessAuthCode gate so they apply even when an access...

CVE-2026-72809

SiYuan versions = v3.7.2 patched in v3.7.4 contain an authentication bypass vulnerability in the kernel's CheckAuth function, which grants the administrator role RoleAdministrator to any request whose RemoteAddr is loopback 127.0.0.1 for a specific set of endpoints including /api/system/exit,...

CVE-2026-72809

Summary: SiYuan before v3.7.4 contains an authentication bypass in the kernel’s CheckAuth function that grants the administrator role to any request from the loopback address for a specific set of endpoints (e.g., /api/system/exit, getNetwork, getWorkspaceInfo, /assets/, /export/ ). The bypass oc...