CVE-2022-24787

Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine. In version 0.3.1 and prior, bytestrings can have dirty bytes in them, resulting in the word-for-word comparisons giving incorrect results. Even without dirty nonzero bytes, two bytestrings can compare to equal if one ends with `"\x00"` because there is no comparison of the length. A patch is available and expected to be part of the 0.3.2 release. There are currently no known workarounds.

• CWE-697
• CWE-697

• https://github.com/vyperlang/vyper/commit/2c73f8352635c0a433423a5b94740de1a118e508Patch, Third Party Advisory
• https://github.com/vyperlang/vyper/security/advisories/GHSA-7vrm-3jc8-5wwmPatch, Third Party Advisory
• https://github.com/vyperlang/vyper/commit/2c73f8352635c0a433423a5b94740de1a118e508Patch, Third Party Advisory
• https://github.com/vyperlang/vyper/security/advisories/GHSA-7vrm-3jc8-5wwmPatch, Third Party Advisory

Published

Apr 4, 2022

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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