immutable — security advisory

{
  "id": "d95fac6fafb5ac21a98de01ab059eff1f895a7b0d7f0579aa9e8e7886a15f063",
  "url": "https://osv.dev/vulnerability/ECHO-5345-cd12-bd9a",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ECHO-5345-cd12-bd9a",
    "summary": "ECHO-5345-cd12-bd9a",
    "evidence": "osv:ECHO-5345-cd12-bd9a",
    "products": [
      {
        "name": {
          "value": "immutable",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.7.6+echo.1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "ECHO-5345-cd12-bd9a",
      "aliases": [
        "ECHO-5345-cd12-bd9a"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3.7.6+echo.1"
                }
              ]
            }
          ],
          "package": {
            "name": "immutable",
            "purl": "pkg:npm/immutable",
            "ecosystem": "Echo:npm"
          },
          "database_specific": {
            "source": "https://advisory.echohq.com/osv/ECHO-5345-cd12-bd9a.json"
          }
        }
      ],
      "modified": "2026-10-20T12:45:03.150544105Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-59879",
        "GHSA-v56q-mh7h-f735"
      ],
      "references": [
        "https://advisory.echohq.com/cve/CVE-2026-59879",
        "https://github.com/immutable-js/immutable-js/security/advisories/GHSA-v56q-mh7h-f735",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-59879",
        "https://github.com/immutable-js/immutable-js/commit/a1a1ee412dcaa380ab325196283d06594ffe4b84",
        "https://github.com/immutable-js/immutable-js/commit/f0bc997d8eb9886aff2236635aa210a95a04304a",
        "https://github.com/immutable-js/immutable-js/releases/tag/v4.3.9",
        "https://github.com/immutable-js/immutable-js/releases/tag/v5.1.8",
        "https://github.com/immutable-js/immutable-js/releases/tag/v3.8.4",
        "https://github.com/advisories/GHSA-v56q-mh7h-f735"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-59879",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 387291,
  "published_at": "2026-10-20T12:21:50.488+00:00"
}