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Medium

OpenZeppelin Contracts contains Incorrect Calculation

Type: advisorySources: OSV

OpenZeppelin Contracts is a library for secure smart contract development. The ERC721Consecutive contract designed for minting NFTs in batches does not update balances when a batch has size 1 and consists of a single token. Subsequent transfers from the receiver of that token may overflow the balance as reported by `balanceOf`. The issue exclusively presents with batches of size 1. The issue has been patched in 4.8.2.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2023-26488
Confirmed fixed CVEs
Not specified
Updated in this feed
3 Nov 2026, 19:46 UTC · Revision 1

Source evidence

OpenZeppelin Contracts contains Incorrect Calculation

core-osv · Original source

Published 3 Mar 2023, 21:08 UTC

OpenZeppelin Contracts is a library for secure smart contract development. The ERC721Consecutive contract designed for minting NFTs in batches does not update balances when a batch has size 1 and consists of a single token. Subsequent transfers from the receiver of that token may overflow the balance as reported by `balanceOf`. The issue exclusively presents with batches of size 1. The issue has been patched in 4.8.2.

osv:CVE-2023-26488
Complete source record
{
  "id": "c450a0de3d12392a240818aad68803d68989a94638a263fcc518b47c9ce205f0",
  "url": "https://osv.dev/vulnerability/CVE-2023-26488",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "OpenZeppelin Contracts contains Incorrect Calculation",
    "summary": "OpenZeppelin Contracts is a library for secure smart contract development. The ERC721Consecutive contract designed for minting NFTs in batches does not update balances when a batch has size 1 and consists of a single token. Subsequent transfers from the receiver of that token may overflow the balance as reported by `balanceOf`. The issue exclusively presents with batches of size 1. The issue has been patched in 4.8.2.",
    "evidence": "osv:CVE-2023-26488",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2023-26488",
      "aliases": [
        "CVE-2023-26488",
        "GHSA-878m-3g6q-594q"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openzeppelin/openzeppelin-contracts",
              "type": "GIT",
              "events": [
                {
                  "introduced": "49c0e4370d0cc50ea6090709e3835a3091e33ee2"
                },
                {
                  "fixed": "d00acef4059807535af0bd0dd0ddf619747a044b"
                },
                {
                  "fixed": "167bf67ed3907f4a674043496019fa346cee7705"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:openzeppelin:contracts:*:*:*:*:*:node.js:*:*",
                    "range": [
                      {
                        "introduced": "4.8.0"
                      },
                      {
                        "fixed": "4.8.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:openzeppelin:contracts_upgradeable:*:*:*:*:*:node.js:*:*",
                    "range": [
                      {
                        "introduced": "4.8.0"
                      },
                      {
                        "fixed": "4.8.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "167bf67ed3907f4a674043496019fa346cee7705"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "d00acef4059807535af0bd0dd0ddf619747a044b"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v4.8.2"
                  }
                ]
              }
            },
            {
              "repo": "https://github.com/openzeppelin/openzeppelin-contracts-upgradeable",
              "type": "GIT",
              "events": [
                {
                  "introduced": "65420cb9c943c32eb7e8c9da60183a413d90067a"
                },
                {
                  "fixed": "f6c4c9c4ec601665ca74d2c9dddf547fc425658c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:openzeppelin:contracts_upgradeable:*:*:*:*:*:node.js:*:*",
                    "range": [
                      {
                        "introduced": "4.8.0"
                      },
                      {
                        "fixed": "4.8.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v4.8.1",
            "v4.8.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-26488.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:31.806568323Z",
      "provider": "osv",
      "references": [
        "https://github.com/OpenZeppelin/openzeppelin-contracts/releases/tag/v4.8.2",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/26xxx/CVE-2023-26488.json",
        "https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-878m-3g6q-594q",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-26488",
        "https://github.com/OpenZeppelin/openzeppelin-contracts/commit/167bf67ed3907f4a674043496019fa346cee7705"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-682"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/26xxx/CVE-2023-26488.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-26488",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 498798,
  "published_at": "2023-03-03T21:08:34.886+00:00"
}