Vulnerability in Vyperlang Vyper
CVE-2023-42460
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.007 (50.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.007 · change: +0.001
Affected products
- Vyperlang Vyper — versions >= 0.3.4, < 0.3.10
Weakness classification (CWE)
References
- github.com/vyperlang/vyper/security/advisories/GHSA-cx2q-hfxr-rj97 (Exploit, Patch, Third Party Advisory)
- github.com/vyperlang/vyper/pull/3626 (Patch)
Frequently asked questions
- What is CVE-2023-42460?
- CVE-2023-42460 is a medium-severity vulnerability in Vyperlang Vyper, classified under Incorrect Calculation. CVSS score: 5.3/10. Published 2023-09-27.
- How severe is CVE-2023-42460?
- Medium severity. CVSS v3 base score is 5.3 out of 10.