CVE-2026-87810
Siyuan before v3.8.2 Information Disclosure via fullTextSearchBlock
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
Siyuan before v3.8.2 contains an information disclosure vulnerability in the POST /api/search/fullTextSearchBlock endpoint that filters private blocks from results but returns unfiltered match counts. Unauthenticated publish-mode readers can submit arbitrary search terms to learn whether matching content exists in hidden or unpublished documents and determine the number of matching blocks and pages.
| CWE | CWE-200 |
| Vendor | siyuan-note |
| Product | siyuan |
| Published | Sep 9, 2026 |
| Last Updated | Sep 14, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected Versions
siyuan-note / siyuan
0 < 3.8.2