CVE-2021-41122

mediumpriority · track · 16EPSS 0.008 · 56 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.80% (56th) EPSS

CVSS 4 · medium

Is it mine?

3 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · osv · nvd

EPSS · scored 2026-10-27

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

Technical severity, 0–10. One row per scoring source.

4.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04mediumAV:N/AC:L/Au:S/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 8 · impact 2.9

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:Nsecondary · ENISA EU

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:Nsecondary · security-advisories@github.comexploitability 2.8 · impact 1.4

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:Nsecondary · OSV

v3.14mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-682USCWE-682US

affected products (3)

Products and version ranges known to be affected.

vyperlang vyper≤ < 0.3.0enisa_euvdEU
vyperlang vyper< 0.3.0nvdUScpe:2.3:a:vyperlang:vyper:*:*:*:*:*:*:*:*
PyPI vyper< 0.3.0osvUSpkg:pypi/vyper

advisories (2)

Vendor and ecosystem advisories describing this.

GHSA-c7pr-343r-5c46missing clamps for decimal args in external functions2021-10-06ghsa · osvUS
### Impact The following code does not properly validate that its input is in bounds. ```python @external def foo(x: decimal) -> decimal: return x ``` ### Patches 0.3.0 / #2447 ### Workarounds Don't use decimal args
PYSEC-2021-3662021-10-05vendor · osvUS
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.

also known as (6)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv nvd NVD CVE.org MITRE

published 2021-10-05modified 2026-06-17

references (7)

External citations — patches, advisories, analysis.

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