CVE-2026-93921SiYuan through 3.8.4 Access Control Bypass via Dynamic Icon Endpoint
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 4.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- Weakness (CWE)
- CWE-862
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Sep 21, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
siyuan-note siyuan siyuan_note:siyuan (from the name) | through 3.8.4 | CNA record |
References
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-whcx-xxqh-c838vendor-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
- https://www.vulncheck.com/advisories/siyuan-through-3.8.4-access-control-bypass-via-dynamic-icon-endpointthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.