CVE-2026-54068
Description
SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, the /api/icon/getDynamicIcon endpoint is explicitly excluded from authentication in SiYuan's kernel router (router.go, "不需要鉴权" -- no auth needed). When called with type=8 and a valid block id parameter, this endpoint invokes RenderDynamicIconContentTemplate, which executes a Go template that includes the querySQL and queryBlocks functions. These functions run arbitrary SELECT statements against the SiYuan SQLite database. An unauthenticated network-adjacent attacker who knows a valid block ID can exfiltrate all user note content, tags, asset references, and block attributes from the database. This vulnerability is fixed in 3.7.0.
Summary dbcve.org
SiYuan's /api/icon/getDynamicIcon endpoint is explicitly excluded from authentication. When called with type=8 and a valid block ID, it executes Go templates containing querySQL and queryBlocks functions that run arbitrary SELECT statements against the SQLite database, allowing unauthenticated network-adjacent attackers to exfiltrate all user note content, tags, assets, and block attributes.
Mitigation
Upgrade to SiYuan version 3.7.0 or later to patch this authentication bypass vulnerability.