CVE-2023-42460
Vyper's `_abi_decode` input not validated in complex expressions
5.3
MEDIUM
CVSS 3.1
EPSS 0.05%
Description
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.
How to fix CVE-2023-42460
To remediate CVE-2023-42460, upgrade the affected package to a fixed version below.
- —upgrade to 0.3.10 or later
- —upgrade to 0.3.10 or later
Is CVE-2023-42460 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- >= 0.3.4, < 0.3.10
- >= 0.3.4, < 0.3.10
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N |