CVE-2026-87809
7.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Summary
Siyuan before v3.8.2 fails to apply publish-access filtering to embedded blocks before rendering in the /api/export/preview and /api/lute/copyStdMarkdown endpoints. Attackers with reader access can retrieve the full rendered content of private, hidden, or publish-disabled blocks by accessing public documents containing embed queries that select those blocks.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| siyuan-note | siyuan | 0 < 3.8.2 | affected |
| siyuan-note | siyuan | 3.8.2 | unaffected |
Weaknesses
- CWE-639: Authorization Bypass Through User-Controlled Key
References
- https://github.com/siyuan-note/siyuan/security/advisories/GHSA-8wx4-fvqw-f5f8
- https://www.vulncheck.com/advisories/siyuan-before-3.8.2-information-disclosure-via-export-preview
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