CVE-2026-87810
Siyuan before v3.8.2 Information Disclosure via fullTextSearchBlock
- State
- Published
- Severity
- 6.9 Medium
- Published
- Sep 9, 2026
- Updated
- Sep 14, 2026
- Reserved
- Sep 9, 2026
Description
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publish-mode readers can submit arbitrary search terms to learn whether matching content exists in hidden or unpublished documents and determine the number of matching blocks and pages.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N | VulnCheck |
Weaknesses
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
Affected Products
| Product | Versions |
|---|---|
siyuansiyuan-note |
|
References
- GitHub Security Advisory (GHSA-g45v-hxvm-wccj)vendor-advisory
- VulnCheck Advisory: Siyuan before v3.8.2 Information Disclosure via fullTextSearchBlockthird-party-advisory
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