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Medium

OpenZeppelin Contracts and Contracts Upgradeable duplicated execution of subcalls in v4.9.4

  • Disclosed: 12.12.2023
  • Updated: 11.10.2026 10:22

Context

Merge conflict resolution issue when porting the v5.0.1 Multicall update to the v4.9 branch caused a duplicated line.

Impact

Versions using Multicall from @openzeppelin/contracts@4.9.4 and @openzeppelin/contracts-upgradeable@4.9.4 will execute each subcall twice. Concretely, this exposes a user to unintentionally duplicate operations like asset transfers.

Patches

The duplicated delegatecall was removed in 4.9.5. The 4.9.4 version is marked as deprecated.

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
npm package @openzeppelin/contracts >= 4.9.4, < 4.9.5 4.9.5
npm package @openzeppelin/contracts-upgradeable >= 4.9.4, < 4.9.5 4.9.5

References

CVSS score 5.9/10
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness (CWE)
CWE-670
Platform
npm
Package
@openzeppelin/contracts, @openzeppelin/contracts-upgradeable
Disclosed
12.12.2023
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-699g-q6qh-q4v8 - CC BY 4.0

Vulnerability history: @openzeppelin/contracts-upgradeable

All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (22) in the archive
Total entries
22
First → latest
08.2021 07.2025
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • Critical 3
  • High 5
  • Medium 12
  • Low 2

Disclosures per year

Severity:
  1. OpenZeppelin Contracts and Contracts Upgradeable duplicated execution of subcalls in v4.9.4 this entry
    Medium · 5.9 CVE-2023-49798 >= 4.9.4, < 4.9.5 4.9.5
  2. GovernorCompatibilityBravo may trim proposal calldata
    High · 8.8 CVE-2023-30542 >= 4.3.0, < 4.8.3 4.8.3
  3. OpenZeppelin Contracts vulnerable to ECDSA signature malleability
    High · 7.9 CVE-2022-35961 >= 4.1.0, < 4.7.3 4.7.3
  4. OpenZeppelin Contracts's GovernorVotesQuorumFraction updates to quorum may affect past defeated proposals
    High · 7.5 CVE-2022-31198 >= 4.3.0, < 4.7.2 4.7.2
  5. OpenZeppelin Contracts's SignatureChecker may revert on invalid EIP-1271 signers
    High · 7.5 CVE-2022-31172 >= 4.1.0, < 4.7.1 4.7.1
  6. OpenZeppelin Contracts's ERC165Checker may revert instead of returning false
    High · 7.5 CVE-2022-31170 >= 4.0.0, < 4.7.1 4.7.1
  7. UUPSUpgradeable vulnerability in @openzeppelin/contracts
    Critical · 9.8 CVE-2021-41264 >= 4.1.0, < 4.3.2 4.3.2
  8. UUPSUpgradeable vulnerability in @openzeppelin/contracts-upgradeable
    Critical ghsa-q4h9-46xg-m3x9 >= 4.1.0, < 4.3.2 4.3.2
  9. TimelockController vulnerability in OpenZeppelin Contracts
    Critical · 10.0 CVE-2021-39168 >= 4.0.0, < 4.3.1, >= 3.3.0, < 3.4.2 4.3.1, 3.4.2

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