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No exploitation reportedFix available

CVE-2018-20835

No exploitation reported by the sources we read.

  • Published2019-04-30
  • Fixed in1.16.2
  • WeaknessCWE-20

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A vulnerability was found in tar-fs before 1.16.2. 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.

Timeline

dates in UTC
  1. 2019-04-3019:29CVE publishedNVD

Versions per branch

NVD · OSV
Tar-fs project tar-fs
BranchAffectedFixed in
1.16< 1.16.21.16.2

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • tar-fsTuxCare:npmfrom 1.5.1-tuxcare.0 · fixed in 1.5.1-tuxcare.1

Full record on NVD

Fix

  1. Update Tar-fs project tar-fs to 1.16.2

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Published
2019-04-30
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-x2mc-8fgj-3wmr

Frequently asked questions

What is CVE-2018-20835?

A vulnerability was found in tar-fs before 1.16.2. 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.

Is CVE-2018-20835 actively exploited?

Active exploitation of CVE-2018-20835 has not been confirmed. Its EPSS score was 2.4% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-20835?

CVE-2018-20835 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

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