What is CVE-2023-32675?

CVE-2023-32675 is a low-severity vulnerability in Vyperlang Vyper, classified under Always-Incorrect Control Flow Implementation. CVSS score: 3.7/10. Published 2023-05-19.

How severe is CVE-2023-32675?

Low severity. CVSS v3 base score is 3.7 out of 10.

Vulnerability in Vyperlang Vyper

CVE-2023-32675

Vyper is a pythonic Smart Contract Language for the ethereum virtual machine. In contracts with more than one regular nonpayable function, it is possible to send funds to the default function, even if the default function is marked `nonpayable`. This applies to contracts compiled with vyper versions prior to 0.3.8. This issue was fixed by the removal of the global `calldatasize` check in commit `02339dfda`. Users are advised to upgrade to version 0.3.8. Users unable to upgrade should avoid use of nonpayable default functions.

Published 2023-05-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (44.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.0% 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: 0.006 · change: 0.000

Affected products

Vyperlang Vyper — versions < 0.3.8

Weakness classification (CWE)

CWE-670 — Always-Incorrect Control Flow Implementation

References

github.com/vyperlang/vyper/security/advisories/GHSA-vxmm-cwh2-q762 (Exploit, Patch, Vendor Advisory)
github.com/vyperlang/vyper/commit/02339dfda0f3caabad142060d511d10bfe93c520 (Patch)

Frequently asked questions

What is CVE-2023-32675?: CVE-2023-32675 is a low-severity vulnerability in Vyperlang Vyper, classified under Always-Incorrect Control Flow Implementation. CVSS score: 3.7/10. Published 2023-05-19.
How severe is CVE-2023-32675?: Low severity. CVSS v3 base score is 3.7 out of 10.