CVE-2026-87810

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publish-mode readers can submit arbitrary search terms to learn whether matching content exists in hidden or unpublished documents and determine the number of matching blocks and pages.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-g45v-hxvm-wccj
https://www.vulncheck.com/advisories/siyuan-before-3.8.2-information-disclosure-via-fulltextsearchblock
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-g45v-hxvm-wccj

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-09 12:17

Updated : 2026-09-14 13:19

NVD link : CVE-2026-87810

Mitre link : CVE-2026-87810

CVE.ORG link : CVE-2026-87810

JSON object : View

Products Affected

No product.

CWE

CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

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