Security advisory

{
  "id": "c610fa516880d266a820b05c9ba8ecb694b514b586f885ebe307a2e3dd5534f3",
  "url": "https://osv.dev/vulnerability/CVE-2021-46320",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-46320",
    "summary": "In OpenZeppelin <=v4.4.0, initializer functions that are invoked separate from contract creation (the most prominent example being minimal proxies) may be reentered if they make an untrusted non-view external call. Once an initializer has finished running it can never be re-executed. However, an exception put in place to support multiple inheritance made reentrancy possible, breaking the expectation that there is a single execution.",
    "evidence": "osv:CVE-2021-46320",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-46320",
      "aliases": [
        "CVE-2021-46320",
        "CVE-2022-39384",
        "GHSA-88g8-f5mf-f5rj",
        "GHSA-9c22-pwxw-p6hx"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openzeppelin/openzeppelin-contracts",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1ada3b633e5bfd9d4ffe0207d64773a11f5a7c40"
                },
                {
                  "last_affected": "4961a51cc736c7d4aa9bd2e11e4cbbaff73efee9"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:openzeppelin:openzeppelin:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.2.0"
                      },
                      {
                        "last_affected": "4.4.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-46320.json"
          }
        }
      ],
      "modified": "2026-10-20T10:55:09.495137448Z",
      "provider": "osv",
      "references": [
        "https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-9c22-pwxw-p6hx"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-46320",
        "evidence": "/id"
      },
      {
        "value": "CVE-2022-39384",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 386965,
  "published_at": "2022-02-04T12:15:07.623+00:00"
}