CVE-2026-114118

Medium

Description

Vyper 0.3.4 through 0.5.0b1 computes the remaining blueprint size in create_from_blueprint by uint256 subtraction without first checking that code_offset is below the blueprint's code size, so a huge offset wraps to a small positive value. An attacker controlling code_offset can make a factory deploy contracts with no runtime code, potentially trapping ETH and tokens.

SeverityMedium

CVSS4.8

Exploit probability—

Product

Vyper

PublishedOct 21, 2026

First seenOct 21, 2026

Weakness typeCWE-681CWE-681

How to fix

Vendor advisories

github.com/vyperlang/vyper/security/advisories/GHSA-fxg7-4wqg-c8gh

Affected products

Product	Affected versions	Fixed in
vyperlang vyper	0.3.4 ≤ v ≤ 0.5.0b1	—

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