CVE-2026-114116 Vyper through 0.5.0b1 Literal Value Manipulation via Line Separators

Medium 6.0 Published 21 Oct 2026 Updated 28 Oct 2026

Exploited in the wild: Not known
Fix: None listed

What is CVE-2026-114116?

CVE-2026-114116 is a medium-severity vulnerability in vyperlang vyper, published on 21 Oct 2026.

Official 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.

Weakness: CWE-436

Which versions are affected by CVE-2026-114116?

How do I fix CVE-2026-114116?

No fix has been published for CVE-2026-114116 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-114116 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-114116 exists.

Sources

Also known as GHSA-2gvm-cwr3-3pcg, GHSA-wvx7-39qj-2g9v.