CVE-2023-42460

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    CVE-2023-42460

    Published: 26 Sept 2023Last Modified: 12 Aug 2026

    Summary: _abi_decode input not validated in complex expressions in Vyper

    Details: Vyper is a Pythonic Smart Contract Language for the EVM. The `_abi_decode()` function does not validate input when it is nested in an expression. Uses of `_abi_decode()` can be constructed which allow for bounds checking to be bypassed resulting in incorrect results. This issue has not yet been fixed, but a fix is expected in release `0.3.10`. Users are advised to reference pull request #3626.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/42xxx/CVE-2023-42460.json, https://github.com/vyperlang/vyper/security/advisories/GHSA-cx2q-hfxr-rj97, https://nvd.nist.gov/vuln/detail/CVE-2023-42460, https://github.com/vyperlang/vyper/pull/3626

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- f31f0ec406bbbd2055f125abd17278e3ac2ed84f
    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

    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-2023-42460 | CVE-DB