Vulnerability in Vyperlang Vyper
CVE-2026-114116
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.
Published .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/vyperlang/vyper/security/advisories/GHSA-wvx7-39qj-2g9v (vendor-advisory)
- www.vulncheck.com/advisories/vyper-through-0.5-0b1-literal-value-manipulation-v… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-114116?
- CVE-2026-114116 is a medium-severity vulnerability in Vyperlang Vyper, classified under CWE-436. CVSS score: 5.3/10. Published 2026-10-21.
- How severe is CVE-2026-114116?
- Medium severity. CVSS v3 base score is 5.3 out of 10.