UBUNTU-CVE-2020-26217

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    UBUNTU-CVE-2020-26217

    Published: 16 Nov 2020Last Modified: 4 Feb 2026
    Upstream:
    CVE-2020-26217

    Summary:

    Details: XStream before version 1.4.14 is vulnerable to Remote Code Execution.The vulnerability may allow a remote attacker to run arbitrary shell commands only by manipulating the processed input stream. Only users who rely on blocklists are affected. Anyone using XStream's Security Framework allowlist is not affected. The linked advisory provides code workarounds for users who cannot upgrade. The issue is fixed in version 1.4.14.

    References: https://ubuntu.com/security/CVE-2020-26217, https://x-stream.github.io/CVE-2020-26217.html, https://github.com/x-stream/xstream/security/advisories/GHSA-mw36-7c6c-q4q2, https://github.com/x-stream/xstream/commit/0fec095d534126931c99fd38e9c6d41f5c685c1a, https://ubuntu.com/security/notices/USN-4714-1, https://ubuntu.com/security/notices/USN-4943-1, https://www.cve.org/CVERecord?id=CVE-2020-26217, https://ubuntu.com/security/notices/USN-6978-1

    Affected packages

    Package

    Name: libxstream-java

    Purl: pkg:deb/ubuntu/[email protected]+esm2?arch=source&distro=trusty/esm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.4.7-1ubuntu0.1+esm2

    Affected versions

    1.4.4-1
    1.4.7-1
    1.4.7-1ubuntu0.1
    1.4.7-1ubuntu0.1+esm1

    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