CVE-2026-114116
Vyper through 0.5.0b1 Literal Value Manipulation via Line Separators
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-436 |
| Vendor | vyperlang |
| Product | vyper |
| Published | Oct 21, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Affected Versions
vyperlang / vyper
0.1.0b1 < 0.1.0b17
vyperlang / vyper
0.4.1 ≤ 0.5.0b1
References
Credits
🔍 DELENE-TCHIO-ROMUALD