GovernorCompatibilityBravo may trim proposal calldata

{
  "id": "4d009c2e201c23213591131b72f46053a16ead1c2dde9734e7ad98ace35be8a5",
  "url": "https://osv.dev/vulnerability/CVE-2023-30542",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "GovernorCompatibilityBravo may trim proposal calldata",
    "summary": "OpenZeppelin Contracts is a library for secure smart contract development. The proposal creation entrypoint (`propose`) in `GovernorCompatibilityBravo` allows the creation of proposals with a `signatures` array shorter than the `calldatas` array. This causes the additional elements of the latter to be ignored, and if the proposal succeeds the corresponding actions would eventually execute without any calldata. The `ProposalCreated` event correctly represents what will eventually execute, but the proposal parameters as queried through `getActions` appear to respect the original intended calldata. This issue has been patched in 4.8.3. As a workaround, ensure that all proposals that pass through governance have equal length `signatures` and `calldatas` parameters.",
    "evidence": "osv:CVE-2023-30542",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2023-30542",
      "aliases": [
        "CVE-2023-30542",
        "GHSA-93hq-5wgc-jc82"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:H/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openzeppelin/openzeppelin-contracts",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1d2e15fbd7314f4f60b47d97d9b852aacd5404f7"
                },
                {
                  "fixed": "0a25c1940ca220686588c4af3ec526f725fe2582"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "4.3.0"
                      },
                      {
                        "fixed": "4.8.3"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "0a25c1940ca220686588c4af3ec526f725fe2582"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v4.8.3"
                  },
                  {
                    "cpe": "cpe:2.3:a:openzeppelin:contracts:*:*:*:*:*:node.js:*:*",
                    "range": [
                      {
                        "introduced": "4.3.0"
                      },
                      {
                        "fixed": "4.8.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:openzeppelin:contracts_upgradeable:*:*:*:*:*:node.js:*:*",
                    "range": [
                      {
                        "introduced": "4.3.0"
                      },
                      {
                        "fixed": "4.8.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            },
            {
              "repo": "https://github.com/openzeppelin/openzeppelin-contracts-upgradeable",
              "type": "GIT",
              "events": [
                {
                  "introduced": "618d129b52c14aea8d37a413e4c8b643439abe73"
                },
                {
                  "fixed": "58fa0f81c4036f1a3b616fdffad2fd27e5d5ce21"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:openzeppelin:contracts_upgradeable:*:*:*:*:*:node.js:*:*",
                    "range": [
                      {
                        "introduced": "4.3.0"
                      },
                      {
                        "fixed": "4.8.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-30542.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.671794986Z",
      "provider": "osv",
      "references": [
        "https://github.com/OpenZeppelin/openzeppelin-contracts/releases/tag/v4.8.3",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/30xxx/CVE-2023-30542.json",
        "https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-93hq-5wgc-jc82",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-30542"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-20"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/30xxx/CVE-2023-30542.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-30542",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490230,
  "published_at": "2023-04-16T07:10:13.474+00:00"
}