CVE-2021-4435 in yarn - Patched by Root

{
  "id": "00f3b98eff6ec7a04af45ffe37d51fe7281c486cb736da99556c0c505dbc6845",
  "url": "https://osv.dev/vulnerability/ROOT-APP-NPM-CVE-2021-4435",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-4435 in yarn - Patched by Root",
    "summary": "Root has patched CVE-2021-4435 in the yarn package for Root:npm. Multiple fixed versions available.",
    "evidence": "osv:ROOT-APP-NPM-CVE-2021-4435",
    "products": [
      {
        "name": {
          "value": "yarn",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.21.1-aikido.1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "@rootio/yarn",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.21.1-root.io.1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "ROOT-APP-NPM-CVE-2021-4435",
      "aliases": [
        "ROOT-APP-NPM-CVE-2021-4435"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.21.1-aikido.1"
                }
              ]
            }
          ],
          "package": {
            "name": "yarn",
            "ecosystem": "Root:npm"
          },
          "database_specific": {
            "source": "https://api.root.io/external/osv/ROOT-APP-NPM-CVE-2021-4435.json",
            "root_patched": true,
            "upstream_version": "1.21.1",
            "all_fixed_versions": [
              "1.21.1-aikido.1"
            ],
            "root_patch_version": "aikido.1",
            "total_fixed_versions": 1
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.21.1-root.io.1"
                }
              ]
            }
          ],
          "package": {
            "name": "@rootio/yarn",
            "ecosystem": "Root:npm"
          },
          "database_specific": {
            "source": "https://api.root.io/external/osv/ROOT-APP-NPM-CVE-2021-4435.json",
            "root_patched": true,
            "upstream_version": "1.21.1",
            "all_fixed_versions": [
              "1.21.1-root.io.1"
            ],
            "root_patch_version": "root.io.1",
            "total_fixed_versions": 1
          }
        }
      ],
      "modified": "2026-10-07T12:15:05.047578035Z",
      "provider": "osv",
      "upstream": [
        "CVE-2021-4435"
      ],
      "references": [],
      "provider_metadata": {
        "distro": "npm",
        "source": "Root",
        "severity": "HIGH",
        "distro_version": ""
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-4435",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/database_specific/severity"
  },
  "source_id": "core-osv",
  "document_id": 95020,
  "published_at": "2026-10-07T11:20:08+00:00"
}