Vyper is a Pythonic smart contract language for the Ethereum virtual machine. Prior to version 0.3.8, internal calls with default arguments are compiled incorrectly. Depending on the number of arguments provided in the call, the defaults are added not right-to-left, but left-to-right. If the types are incompatible, typechecking is bypassed. The ability to pass kwargs to internal functions is an undocumented feature that is not well known about. The issue is patched in version 0.3.8.
CVE-2023-32059
This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.5
- EG Score
- 7.5(low)
- EPSS
- 49.7%
- KEV
- Not listed
Published
May 11, 2023
Last Modified
November 21, 2024
References (4)
- security-advisories@githubhttps://github.com/vyperlang/vyper/commit/c3e68c302aa6e1429946473769dd1232145822ac
- security-advisories@githubhttps://github.com/vyperlang/vyper/security/advisories/GHSA-ph9x-4vc9-m39g
- af854a3a-2127-422b-91ae-364da2661108https://github.com/vyperlang/vyper/commit/c3e68c302aa6e1429946473769dd1232145822ac
- af854a3a-2127-422b-91ae-364da2661108https://github.com/vyperlang/vyper/security/advisories/GHSA-ph9x-4vc9-m39g
Affected Packages
(1 across 1 ecosystem)
PyPI(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| vyper | 0.1.0b1 ... 0.3.7 (41 versions) | 0.3.8 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 10× in last 7d / 47× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-11 08:26 UTCEPSS rescore
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- 2026-05-23 09:44 UTCEG score recompute
Frequently asked(5)
What is CVE-2023-32059?
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Dependency Blast Radius
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