moment vulnerable to Path Traversal via crafted non-string locale name

{
  "id": "2eec0c2bde43b8a29255e654931d391daa6832c4e6d97a708a1a6cfc33c5a38e",
  "url": "https://osv.dev/vulnerability/CVE-2026-17495",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "moment vulnerable to Path Traversal via crafted non-string locale name",
    "summary": "moment is a JavaScript date library for parsing, validating, manipulating, and formatting dates. In versions 2.29.2 through 2.30.1, a specially crafted non-string object passed to moment.locale() can bypass the locale-name path-traversal guard. The guard assumes the input is a string, so an object whose match() method satisfies the check while its toString() returns a traversal path reaches an internal require() call with attacker-controlled path segments. This is an incomplete fix for CVE-2022-24785 and primarily affects npm (server-side) users that pass user-provided input directly to moment.locale(). The issue is fixed in moment 2.31.0, and users should upgrade to 2.31.0 or later. As a workaround, validate that any user-supplied input is a string before passing it to moment.locale().",
    "evidence": "osv:CVE-2026-17495",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-17495",
      "aliases": [
        "CVE-2026-17495",
        "GHSA-4p3w-j4w9-5jqw"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/moment/moment",
              "type": "GIT",
              "events": [
                {
                  "introduced": "75e2ac573e8cd62086a6bc6dc1b8d271e2804391"
                },
                {
                  "fixed": "15b45d48a176312e8f34143c5a800090abf4787f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "2.29.2"
                      },
                      {
                        "fixed": "2.31.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "2.29.2"
                      },
                      {
                        "last_affected": "2.30.1"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.30.1",
            "2.30.0",
            "2.29.4",
            "2.29.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-17495.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:40.486371684Z",
      "provider": "osv",
      "references": [
        "https://cna.openjsf.org/security-advisories.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/17xxx/CVE-2026-17495.json",
        "https://github.com/moment/moment/security/advisories/GHSA-4p3w-j4w9-5jqw",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-17495"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-27"
        ],
        "cna_assigner": "openjs",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/17xxx/CVE-2026-17495.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-17495",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 508058,
  "published_at": "2026-09-15T05:40:55.263+00:00"
}