CVE-2026-87810

    Dashboard / Vulnerabilities / CVE-2026-87810

    CVE-2026-87810

    Published: 9 Sept 2026Last Modified: 11 Sept 2026

    Summary: Siyuan before v3.8.2 Information Disclosure via fullTextSearchBlock

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publish-mode readers can submit arbitrary search terms to learn whether matching content exists in hidden or unpublished documents and determine the number of matching blocks and pages.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/87xxx/CVE-2026-87810.json, https://github.com/siyuan-note/siyuan/security/advisories/GHSA-g45v-hxvm-wccj, https://nvd.nist.gov/vuln/detail/CVE-2026-87810, https://www.vulncheck.com/advisories/siyuan-before-3.8.2-information-disclosure-via-fulltextsearchblock

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -44a6c212a994c7ba8129fc38b001a9ab58957c6f

    Affected versions

    v3.8.2-beta.4
    v3.8.2-beta.3
    v3.8.2-beta.2
    v3.8.2-beta.1
    v3.8.2-alpha.6
    v3.8.2-alpha.5
    v3.8.2-alpha.4
    v3.8.2-alpha.3
    v3.8.2-alpha.1
    v3.8.1
    v3.8.1-beta.6
    v3.8.1-beta.5
    v3.8.1-beta.4
    v3.8.1-beta.1
    v3.8.0
    v3.8.0-beta.2
    v3.8.0-alpha.4
    v3.8.0-alpha.3
    v3.8.0-alpha.2

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-87810 | CVE-DB