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Medium · 4.3 CVE-2026-93921 EUVD-2026-83457GHSA-j5v6-qhh5-48r7

SiYuan through 3.8.4 Access Control Bypass via Dynamic Icon Endpoint

Published Sep 18, 2026 · Updated Sep 21, 2026 · Assigned by VulnCheck

Description

SiYuan versions through 3.8.4 fail to enforce publish access control in the getDynamicIcon endpoint, allowing read-only token holders to access document metadata. Attackers can call the endpoint with type=8 and crafted content to read block titles, names, aliases, and hierarchical paths of restricted documents via template injection.

Affected products

VendorProductAffectedFixed
siyuan-note siyuan ≤ 3.8.4 —

References