CVE-2023-42441

    Dashboard / Vulnerabilities / CVE-2023-42441

    CVE-2023-42441

    Published: 18 Sept 2023Last Modified: 12 Aug 2026

    Summary: Vyper has incorrect re-entrancy lock when key is empty string

    Details: Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine (EVM). Starting in version 0.2.9 and prior to version 0.3.10, locks of the type `@nonreentrant("")` or `@nonreentrant('')` do not produce reentrancy checks at runtime. This issue is fixed in version 0.3.10. As a workaround, ensure the lock name is a non-empty string.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/42xxx/CVE-2023-42441.json, https://github.com/vyperlang/vyper/security/advisories/GHSA-3hg2-r75x-g69m, https://nvd.nist.gov/vuln/detail/CVE-2023-42441, https://github.com/vyperlang/vyper/commit/0b740280c1e3c5528a20d47b29831948ddcc6d83, https://github.com/vyperlang/vyper/pull/3605

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 2647ea9033f47011ab0904ac0b3b6c51ca2f76eb
    Fixed -9136169468f317a53b4e7448389aa315f90b95ba

    Affected versions

    v0.3.10rc5
    v0.3.10rc4
    v0.3.10rc3
    v0.3.10rc2
    v0.3.10rc1
    v0.3.9
    v0.3.8
    v0.3.7
    v0.3.6
    v0.3.5
    v0.3.4
    v0.3.3
    v0.3.2
    v0.3.1
    v0.3.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2023-42441 | CVE-DB