CVE-2026-93921
SiYuan through 3.8.4 Access Control Bypass via Dynamic Icon Endpoint
- State
- Published
- Severity
- 5.3 Medium
- Published
- Sep 18, 2026
- Updated
- Sep 21, 2026
- Reserved
- Sep 18, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 4.3 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N | VulnCheck |
Weaknesses
- CWE-862 Missing Authorization
Affected Products
| Product | Versions |
|---|---|
siyuansiyuan-note |
|
References
- GitHub Security Advisory (GHSA-whcx-xxqh-c838)vendor-advisory
- https://github.com/siyuan-note/siyuanproduct
- https://github.com/siyuan-note/siyuan/blob/v3.8.4/kernel/api/router.go#L51technical-description
- https://github.com/siyuan-note/siyuan/blob/v3.8.4/kernel/model/template.go#L485-L526technical-description
- https://github.com/siyuan-note/siyuan/blob/v3.8.4/kernel/api/icon.go#L546-L549technical-description
- VulnCheck Advisory: SiYuan through 3.8.4 Access Control Bypass via Dynamic Icon Endpointthird-party-advisory
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