CVE-2023-42441

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.

• CWE-833
• CWE-667

• 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

Published

Sep 18, 2023

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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