CVE-2021-41122

MEDIUMNVD 4.34.3—

4.3

Vyper is a Pythonic Smart Contract Language for the EVM. In affected versions external functions did not properly validate the bounds of decimal arguments. The can lead to logic errors. This issue has been resolved in version 0.3.0.

CVSS v3: 4.3
EG Score: 4.3(medium)
EPSS: 42.3%
KEV: Not listed

Published

October 5, 2021

Last Modified

November 21, 2024

References (4)

security-advisories@githubhttps://github.com/vyperlang/vyper/pull/2447
security-advisories@githubhttps://github.com/vyperlang/vyper/security/advisories/GHSA-c7pr-343r-5c46
af854a3a-2127-422b-91ae-364da2661108https://github.com/vyperlang/vyper/pull/2447
af854a3a-2127-422b-91ae-364da2661108https://github.com/vyperlang/vyper/security/advisories/GHSA-c7pr-343r-5c46

Affected Packages

(1 across 1 ecosystem)

PyPI(1)

Package	Vulnerable range	Fixed in	Dependents
vyper	0.1.0b1 ... 0.2.9 (33 versions)	0.3.0	—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-682Incorrect Calculation

Data Freshness Timeline

(refreshed 11× in last 7d / 19× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
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2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
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2026-05-31 00:15 UTCepss_batch
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2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
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2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 09:28 UTCEG score recompute
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2021-41122?

CVE-2021-41122 is a medium vulnerability published on October 5, 2021. Vyper is a Pythonic Smart Contract Language for the EVM. In affected versions external functions did not properly validate the bounds of decimal arguments. The can lead to logic errors. This issue has been resolved in version 0.3.0.

When was CVE-2021-41122 disclosed?

CVE-2021-41122 was first published in the National Vulnerability Database on October 5, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-41122 actively exploited?

CVE-2021-41122 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 42.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-41122?

CVE-2021-41122 has a CVSS v3 base score of 4.3 (NVD).

How do I remediate CVE-2021-41122?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-41122, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-41122

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