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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...

Published: Apr 30, 2019Updated: Feb 4, 2026 Sources: CVE List NVD GHSA BDUCWE-59
NVD MITRE
7.5CVSSHIGH
EPSS Score
3.1%
Top 13.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Arbitrary File Overwrite in tar

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-59

Affected Products

tarnpmOSS Libraries
n/an/a
Red Hat Enterprise LinuxRed Hat Inc.
On-premOS
Operating Systems / linux-distro
node-tarNode.js FoundationOSS Libraries
tarisaacs
Library
OSS Libraries / npm
npmpackage-ecosystemOSS Libraries
red hat inc.commercialUSOperating Systemsaka red hat
node.js foundationoss-projectUSOSS Librariesaka nodejs foundation, node foundation
isaacsindividual-devOSS Librariesaka isaacs node packages, isaacs tar

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Collection
Discovery
View detailed technique mapping

References

https://nvd.nist.gov/vuln/detail/CVE-2018-20834
nvd.nist.gov
https://github.com/npm/node-tar/commit/7ecef07da6a9e72cc0c4d0c9c6a8e85b6b52395d
github.com
https://github.com/npm/node-tar/commit/b0c58433c22f5e7fe8b1c76373f27e3f81dcd4c8
github.com
and 6 more references View all →

Timeline

Published
Apr 30, 2019
Last Updated
Feb 4, 2026

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