Security advisory

{
  "id": "3c07ec8f20e89e79d5271d34ad87f515960dd603f1aed94fbd17a16492d8d0e9",
  "url": "https://osv.dev/vulnerability/CVE-2021-23566",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-23566",
    "summary": "The package nanoid from 3.0.0 and before 3.1.31 are vulnerable to Information Exposure via the valueOf() function which allows to reproduce the last id generated.",
    "evidence": "osv:CVE-2021-23566",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-23566",
      "aliases": [
        "CVE-2021-23566",
        "GHSA-qrpm-p2h7-hrv2"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ai/nanoid",
              "type": "GIT",
              "events": [
                {
                  "introduced": "7b45b890ce9cba85c8dc08fdb7ad401b966ed067"
                },
                {
                  "fixed": "07fdfa6618e2668ce51b2554ee3e1a3ad87b0492"
                },
                {
                  "fixed": "2b7bd9332bc49b6330c7ddb08e5c661833db2575"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:nanoid_project:nanoid:*:*:*:*:*:node.js:*:*",
                    "range": [
                      {
                        "introduced": "3.0.0"
                      },
                      {
                        "fixed": "3.1.31"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "2b7bd9332bc49b6330c7ddb08e5c661833db2575"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.1.30",
            "3.1.29",
            "3.1.28",
            "3.1.27",
            "3.1.26",
            "3.1.25",
            "3.1.24",
            "3.1.23",
            "3.1.22",
            "3.1.21",
            "3.1.20",
            "3.1.19",
            "3.1.18",
            "3.1.17",
            "3.1.16",
            "3.1.15",
            "3.1.14",
            "3.1.13",
            "3.1.12",
            "3.1.11",
            "3.1.10",
            "3.1.9",
            "3.1.8",
            "3.1.7",
            "3.1.6",
            "3.1.5",
            "3.1.4",
            "3.1.2",
            "3.1.1",
            "3.1.0",
            "3.0.2",
            "3.0.1",
            "3.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-23566.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:32.903533284Z",
      "provider": "osv",
      "references": [
        "https://lists.debian.org/debian-lts-announce/2024/12/msg00025.html",
        "https://lists.debian.org/debian-lts-announce/2025/01/msg00006.html",
        "https://github.com/ai/nanoid/commit/2b7bd9332bc49b6330c7ddb08e5c661833db2575",
        "https://github.com/ai/nanoid/pull/328",
        "https://gist.github.com/artalar/bc6d1eb9a3477d15d2772e876169a444",
        "https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2332550",
        "https://snyk.io/vuln/SNYK-JS-NANOID-2332193"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-23566",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 385550,
  "published_at": "2022-01-14T20:15:10.093+00:00"
}