CVE-2026-93921
SiYuan through 3.8.4 Access Control Bypass via Dynamic Icon Endpoint
CVSS Score
4.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-862 |
| Vendor | siyuan-note |
| Product | siyuan |
| Published | Sep 18, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected Versions
siyuan-note / siyuan
0 ≤ 3.8.4
References
github.com: https://github.com/siyuan-note/siyuan/security/advisories/GHSA-whcx-xxqh-c838 github.com: https://github.com/siyuan-note/siyuan github.com: https://github.com/siyuan-note/siyuan/blob/v3.8.4/kernel/api/router.go#L51 github.com: https://github.com/siyuan-note/siyuan/blob/v3.8.4/kernel/model/template.go#L485-L526 github.com: https://github.com/siyuan-note/siyuan/blob/v3.8.4/kernel/api/icon.go#L546-L549 vulncheck.com: https://www.vulncheck.com/advisories/siyuan-through-3.8.4-access-control-bypass-via-dynamic-icon-endpoint
Credits
EVIL0RD