CVE-2026-84282

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    CVE-2026-84282

    Published: 8 Sept 2026Last Modified: 12 Sept 2026

    Summary: A Server-Side Request Forgery (SSRF) vulnerability exists in the ONLYOFFICE ownCloud Integration plugin (version 9.12)

    Details: A Server-Side Request Forgery (SSRF) vulnerability exists in the ONLYOFFICE ownCloud Integration plugin version 9.12. The /apps/onlyoffice/ajax/settings/address endpoint does not sufficiently validate the user-supplied Document Server URL before initiating outbound connections. An authenticated administrator can manipulate the document server parameter to cause the ownCloud server to send arbitrary requests to attacker-controlled destinations, including localhost and internal network hosts. This allows internal network reconnaissance and TCP port scanning based on differences in server responses.

    References: https://github.com/ONLYOFFICE/onlyoffice-owncloud/blob/master/controller/settingsapicontroller.php, https://kb.cert.org/vuls/id/943094, https://www.kb.cert.org/vuls/id/943094, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84282.json, https://nvd.nist.gov/vuln/detail/CVE-2026-84282

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 91820ebe8ae227d604a2340cb5a2964cacd62077
    Fixed -None

    Affected versions

    9.12

    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-2026-84282 | CVE-DB