CVE-2020-8131

HIGHNVD 7.57.5—

7.5

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.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 77.7%
KEV: Not listed

Published

February 24, 2020

Last Modified

November 21, 2024

References (4)

support@hackeronehttps://github.com/yarnpkg/yarn/pull/7831
support@hackeronehttps://hackerone.com/reports/730239
af854a3a-2127-422b-91ae-364da2661108https://github.com/yarnpkg/yarn/pull/7831
af854a3a-2127-422b-91ae-364da2661108https://hackerone.com/reports/730239

Patch Availability(1)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
redhat	quay/quay-rhel8:v3.4.0-51	2021-02-04	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)

npm(1)

Package	Vulnerable range	Fixed in	Dependents
yarn	—	1.22.0	—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-22Path Traversal

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Red HatRHSA-2021:0420MODERATE2020-02-14
RHSA-2021:0420 — Moderate

Data Freshness Timeline

(refreshed 8× in last 7d / 8× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 07:19 UTCEG score recompute
2026-05-27 07:19 UTCVendor advisory
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2020-8131?

CVE-2020-8131 is a high vulnerability published on February 24, 2020. 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.

When was CVE-2020-8131 disclosed?

CVE-2020-8131 was first published in the National Vulnerability Database on February 24, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2020-8131 actively exploited?

CVE-2020-8131 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 77.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

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

CVE-2020-8131 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2020-8131?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-8131, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2020-8131

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