CVE-2023-26488 json
OpenZeppelin Contracts contains Incorrect Calculation
published 2023-03-03 3 y ago modified 2026-06-17 4 mo ago also GHSA-878m-3g6q-594q , EUVD-2023-0941
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 53%
- public exploits
- 0
- none known
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.
Patch / fix
- npm @openzeppelin/contracts 4.8.2
- npm @openzeppelin/contracts-upgradeable 4.8.2
- openzeppelin contracts 4.8.2
- openzeppelin contracts_upgradeable 4.8.2
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 20 mo ago
Exploit prediction
0.71% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | @openzeppelin/contracts | >=4.8.0, <4.8.2 |
4.8.2 |
| npm | @openzeppelin/contracts-upgradeable | >=4.8.0, <4.8.2 |
4.8.2 |
Affected products
- OpenZeppelin openzeppelin-contracts
Classification
- Weakness
-
- CWE-682 Incorrect Calculation
References
-
github.com
/OpenZeppelin/openzeppelin-contracts/commit/167bf67ed3907f4a674043496019fa346cee7705
web, patch
-
github.com
/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-878m-3g6q-594q
web, third-party-advisory
-
github.com
/OpenZeppelin/openzeppelin-contracts/releases/tag/v4.8.2
web, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2023-26488
advisory
-
github.com
/OpenZeppelin/openzeppelin-contracts
package
Sources
- CVE List CVE-2023-26488
- GitHub Advisory GHSA-878m-3g6q-594q
- NVD CVE-2023-26488
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