Security advisory

{
  "id": "f554f14cd6da7dc1e2cb0e370d9e83c0124ddf2877b2d6c1356cccdad24d9991",
  "url": "https://osv.dev/vulnerability/CVE-2020-8131",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-8131",
    "summary": "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.",
    "evidence": "osv:CVE-2020-8131",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-8131",
      "aliases": [
        "CVE-2020-8131",
        "GHSA-8mfc-v7wv-p62g"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/yarnpkg/yarn",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "95186d5f61ea34de7be6c59b7cfb934cc3b31988"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:yarnpkg:yarn:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.21.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.21.1",
            "v1.21.0",
            "v1.19.0",
            "v1.18.0",
            "v1.17.0",
            "v1.16.0",
            "v1.15.0",
            "v1.14.0",
            "v1.13.0",
            "v1.12.0",
            "v1.11.0",
            "v1.10.0",
            "v1.9.0",
            "v1.8.0",
            "v1.7.0",
            "v1.6.0",
            "v1.5.0",
            "v1.4.1",
            "v1.4.0",
            "v1.3.2",
            "v1.3.1",
            "v1.3.0",
            "v1.2.1",
            "v1.2.0",
            "v1.1.0",
            "v1.0.2",
            "v1.0.1",
            "v1.0.0",
            "v0.28.0",
            "v0.27.0",
            "v0.26.0",
            "v0.25.0",
            "v0.23.0",
            "v0.22.0",
            "v0.21.0",
            "v0.21.0-pre",
            "v0.20.0",
            "v0.19.0",
            "v0.20.0-0",
            "v0.18.0",
            "v0.17.0",
            "v0.18.0-0",
            "v0.19.0-0",
            "v0.17.0-0",
            "v0.15.0",
            "v0.15.1",
            "v0.14.0",
            "v0.13.0",
            "v0.12.0",
            "v0.11.0",
            "v0.10.0",
            "v0.9.0",
            "v0.8.0",
            "v0.7.1",
            "v0.7.0",
            "pre-release"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-8131.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:24.697943921Z",
      "provider": "osv",
      "references": [
        "https://github.com/yarnpkg/yarn/pull/7831",
        "https://hackerone.com/reports/730239"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-8131",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 385317,
  "published_at": "2020-02-24T15:15:12.02+00:00"
}