js-yaml — security advisory

{
  "id": "f67f4f077044612cac6a273525e40c6776e18a25963c182461814932bc6ef90b",
  "url": "https://osv.dev/vulnerability/ECHO-cf9a-2800-40c8",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ECHO-cf9a-2800-40c8",
    "summary": "ECHO-cf9a-2800-40c8",
    "evidence": "osv:ECHO-cf9a-2800-40c8",
    "products": [
      {
        "name": {
          "value": "js-yaml",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "4.1.1+echo.1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "ECHO-cf9a-2800-40c8",
      "aliases": [
        "ECHO-cf9a-2800-40c8"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "4.1.1+echo.1"
                }
              ]
            }
          ],
          "package": {
            "name": "js-yaml",
            "purl": "pkg:npm/js-yaml",
            "ecosystem": "Echo:npm"
          },
          "database_specific": {
            "source": "https://advisory.echohq.com/osv/ECHO-cf9a-2800-40c8.json"
          }
        }
      ],
      "modified": "2026-10-21T13:15:04.506111435Z",
      "provider": "osv",
      "upstream": [
        "GHSA-5p4m-2wfm-xmqj"
      ],
      "references": [
        "https://advisory.echohq.com/cve/GHSA-5p4m-2wfm-xmqj",
        "https://github.com/advisories/GHSA-5p4m-2wfm-xmqj"
      ]
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 393174,
  "published_at": "2026-09-28T00:01:15.221+00:00"
}