CVE-2026-87809
MEDIUM
NVD
CVSS Score
6.5
Severity
MEDIUM
Published
Sep 09, 2026
Vendor
unknown
Description
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.