CVE-2026-114116

Medium

Description

Vyper 0.1.0b1 before 0.1.0b17 and 0.4.1 through 0.5.0b1 builds its source-line table with str.splitlines(), which treats characters like form feed and U+2028 as line breaks the Python parser ignores, so numeric literals are classified and validated from shifted source text. An attacker contributing source code can hide these characters in comments, strings or indentation to silently change address, integer or decimal constants.

SeverityMedium

CVSS5.3

Exploit probability—

Product

Vyper

PublishedOct 21, 2026

First seenOct 21, 2026

Weakness typeCWE-436CWE-436

How to fix

Update

vyperlang vyper0.1.0b17 or later

Vendor advisories

github.com/vyperlang/vyper/security/advisories/GHSA-wvx7-39qj-2g9v

Affected products

Product	Affected versions	Fixed in
vyperlang vyper	0.1.0b1 ≤ v < 0.1.0b17, 0.4.1 ≤ v ≤ 0.5.0b1	0.1.0b17

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.