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No exploitation reportedFix available

CVE-2020-8131

No exploitation reported by the sources we read.

  • Published2020-02-24
  • Fixed in1.22.0
  • WeaknessCWE-22

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

Arbitrary filesystem write vulnerability in Yarn before 1.22.0 allows attackers to write to any path on the filesystem and potentially lead to arbitrary code execution by forcing the user to install a malicious package.

Timeline

dates in UTC
  1. 2020-02-2415:15CVE publishedNVD

Versions per branch

OSV · NVD
yarn
BranchAffectedFixed in
1.22< 1.22.01.22.0
Yarnpkg yarn
BranchAffectedFixed in
1.21≤ 1.21.1no fix published

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

  • @rootio/yarnRoot:npmall versions · fixed in 1.21.1-root.io.1
  • node-yarnpkgDebian:14all versions · fixed in 1.22.4-2
  • node-yarnpkgDebian:13all versions · fixed in 1.22.4-2
  • node-yarnpkgDebian:12all versions · fixed in 1.22.4-2
  • yarnTuxCare:npmfrom 1.15.2-tuxcare.0 · fixed in 1.15.2-tuxcare.1
  • yarnTuxCare:npmfrom 1.21.0-tuxcare.0 · fixed in 1.21.0-tuxcare.1
  • yarnRoot:npmall versions · fixed in 1.21.1-aikido.1

Vendor advisories

  • CVE-2020-8131 Red Hat Product Security11 products fixed

    yarn: Arbitrary filesystem write via tar expansion

  • RHSA-2021:0420 Red Hat Product Security11 products fixed

    Red Hat Security Advisory: Red Hat Quay v3.4.0 security update

Full record on NVD

Fix

  1. Update yarn to 1.22.0
  2. Vendor fix Red Hat Product Security RHSA-2021:0420 · 11 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258

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

  • NVDCVSS 3.17.5read 2026-10-23
  • NVDCVSS 2.05.1read 2026-10-23
  • CNAweakness (CWE)CWE-22known since 2026-10-23
  • NVDweakness (CWE)CWE-22read 2026-10-23
  • FIRST EPSSEPSS score5.2 %2026-11-08
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryHIGH2021-04-08

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2020-02-24
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-8mfc-v7wv-p62g

Frequently asked questions

What is CVE-2020-8131?

Arbitrary filesystem write vulnerability in Yarn before 1.22.0 allows attackers to write to any path on the filesystem and potentially lead to arbitrary code execution by forcing the user to install a malicious package.

Is CVE-2020-8131 actively exploited?

Active exploitation of CVE-2020-8131 has not been confirmed. Its EPSS score was 5.2% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-8131?

CVE-2020-8131 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

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