CVE-2023-42441
Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine (EVM).
Does this matter?
Lower severity and a low EPSS score (0.51%). Track it; it rarely justifies an emergency change on its own.
Description
Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine (EVM). Starting in version 0.2.9 and prior to version 0.3.10, locks of the type `@nonreentrant("")` or `@nonreentrant('')` do not produce reentrancy checks at runtime. This issue is fixed in version 0.3.10. As a workaround, ensure the lock name is a non-empty string.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- EPSS
- 0.51% probability · 44th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-833, CWE-667
- Affected
- vyperlang/vyper
- Source
- security-advisories@github.com
EPSS 0.5% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/vyperlang/vyper/commit/0b740280c1e3c5528a20d47b29831948ddcc6d83Patch
- https://github.com/vyperlang/vyper/pull/3605Issue Tracking, Patch
- https://github.com/vyperlang/vyper/security/advisories/GHSA-3hg2-r75x-g69mExploit, Patch, Vendor Advisory
- https://github.com/vyperlang/vyper/commit/0b740280c1e3c5528a20d47b29831948ddcc6d83Patch
- https://github.com/vyperlang/vyper/pull/3605Issue Tracking, Patch
- https://github.com/vyperlang/vyper/security/advisories/GHSA-3hg2-r75x-g69mExploit, Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.