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    CVE-2018-20834

    A vulnerability was found in node-tar before version 4.4.2 (excluding version 2.2.2). An Arbitrary File Overwrite issue exists when extracting a tarball containing a hardlink to a file that already exists on the system, in conjunction with a later plain file with the same name as the hardlink. This plain file content replaces the existing file content. A patch has been applied to node-tar v2.2.2).

    Published:Apr 30, 2018
    Last Modified:Feb 4, 2026
    EPS:Apr 30, 2019
    EPSS Score:0.00762
    CVSS Score:7.5

    Affected Products

    Vendor
    Isaacs
    Product
    Tar
    Vendor
    Redhat
    Product
    Rhel Software Collections

    Exploits

    https://hackerone.com/reports/344595https://hackerone.com/reports/344595

    Related CVEs

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    CVE-2026-59874 (CVSS 8.7) — node-tar is a tar archive manipulation library for Node.js. Prior to 7.5.18, tar.replace accepts a checksum-va…
    CVE-2026-59873 (CVSS 9.2) — node-tar is a tar archive manipulation library for Node.js. Prior to 7.5.19, node-tar does not enforce hard up…
    CVE-2026-59875 (CVSS 5.3) — node-tar is a tar archive manipulation library for Node.js. Prior to 7.5.17, node-tar does not strip NUL bytes…
    CVE-2026-53655 (CVSS 6.9) — node-tar is a full-featured Tar for Node.js. Prior to 7.5.16, tar (node-tar) applies a PAX extended header's s…
    CVE-2026-31802 (CVSS 8.2) — node-tar is a full-featured Tar for Node.js. Prior to version 7.5.11, tar (npm) can be tricked into creating a…
    CVE-2026-29786 (CVSS 8.2) — node-tar is a full-featured Tar for Node.js. Prior to version 7.5.10, tar can be tricked into creating a hardl…
    CVE-2026-26960 (CVSS 7.1) — node-tar is a full-featured Tar for Node.js. When using default options in versions 7.5.7 and below, an attack…
    CVE-2026-24842 (CVSS 8.2) — node-tar,a Tar for Node.js, contains a vulnerability in versions prior to 7.5.7 where the security check for h…

    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