CVE-2022-21689

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    CVE-2022-21689

    Published: 18 Jan 2022Last Modified: 12 Aug 2026

    Summary: Denial of Service in Onionshare

    Details: OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat with friends using the Tor network. In affected versions the receive mode limits concurrent uploads to 100 per second and blocks other uploads in the same second, which can be triggered by a simple script. An adversary with access to the receive mode can block file upload for others. There is no way to block this attack in public mode due to the anonymity properties of the tor network.

    References: https://github.com/onionshare/onionshare/releases/tag/v2.5, https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/21xxx/CVE-2022-21689.json, https://github.com/onionshare/onionshare/security/advisories/GHSA-jh82-c5jw-pxpc, https://nvd.nist.gov/vuln/detail/CVE-2022-21689

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -6642c25959f14daeb4a572798ccf4acd765d5795

    Affected versions

    v2.4.dev1

    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-2022-21689 | CVE-DB