Link Following Affecting node-tar package, versions <4.4.4+ds1-2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-ECHOLATEST-NODETAR-18507893
- published2 Aug 2026
- disclosed30 Apr 2019
Introduced: 30 Apr 2019
CVE-2018-20834 (opens in a new tab)How to fix?
Upgrade Echo:latest node-tar to version 4.4.4+ds1-2 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream node-tar package and not the node-tar package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
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).
References
- https://advisory.echohq.com/cve/CVE-2018-20834
- https://access.redhat.com/errata/RHSA-2019:1821
- https://github.com/npm/node-tar/commit/7ecef07da6a9e72cc0c4d0c9c6a8e85b6b52395d
- https://github.com/npm/node-tar/commit/b0c58433c22f5e7fe8b1c76373f27e3f81dcd4c8
- https://github.com/npm/node-tar/commits/v2.2.2
- https://github.com/npm/node-tar/compare/58a8d43...a5f7779
- https://hackerone.com/reports/344595
- https://nvd.nist.gov/vuln/detail/CVE-2018-20834