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CVE-2023-26488

21
FAUCET Score

CVE-2023-26488 is a medium-severity vulnerability affecting OpenZeppelin Contracts and Contracts_Upgradeable, specifically within the ERC721Consecutive contract. It allows for an overflow in the balanceOf function when a single-token batch NFT mint occurs, potentially leading to incorrect balance reporting and subsequent transfer issues. The vulnerability has a CVSS score of 6.5 (Medium) due to its low attack complexity and high impact on integrity, but requires authenticated access. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.8.0, < 4.8.2CPE matchmatch criteria
cpe:2.3:a:openzeppelin:contracts:*:*:*:*:*:node.js:*:*
>= 4.8.0, < 4.8.2CPE matchmatch criteria
cpe:2.3:a:openzeppelin:contracts_upgradeable:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.71%
Probability of exploitation in next 30 days
EPSS Percentile
49.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0071 is in the 60th percentile among its peer group of 21,924 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: @openzeppelin/contractsFixed in: 4.8.2
npmpatch availablevia ghsa
Product: @openzeppelin/contracts-upgradeableFixed in: 4.8.2

Vendor Advisories (1)

npmGHSA-878m-3g6q-594qmedium

OpenZeppelin Contracts contains Incorrect Calculation

Mar 3, 2023

References

github.com / OpenZeppelin/openzeppelin-contracts/commit/167bf67ed3907f4a674043496019fa346cee7705
Patch
github.com / OpenZeppelin/openzeppelin-contracts/releases/tag/v4.8.2
Release Notes
github.com / OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-878m-3g6q-594q
Third Party Advisory