CVE-2026-85578 [MEDIUM] – SiYuan through 3.8.1 contains an authorization bypass vulnerability in the /api/file/getFi

SiYuan through 3.8.1 contains an authorization bypass vulnerability in the /api/file/getFile endpoint that allows readers to retrieve files from notebooks explicitly configured as Visible:false. Attackers with reader role can access private workspace files including notebook metadata and internal configuration by knowing the hidden notebook identifier and file path.