CVE-2026-114116Medium· 5.3▾ TwilightPoC availableVyper 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 an…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 29.2 · likelihood 0 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 22.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
Last analysed / modified upstream
Exploit / PoC code exists
0.2% → 0.3%
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.
vyper >= 0.1.0b1 < 0.1.0b17vyper >= 0.4.1 <= 0.5.0b1Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-114114Medium· 5.3Vyper through 0.5.0b1 Literal Value Substitution via Multi-byte Characters
CVE-2026-114117Medium· 5.9Vyper 0.3.8 through 0.5.0b1 Optimizer Miscompilation of msg.value | K in Ternary Branches
CVE-2026-114663High· 8.4Vyper 0.4.0b1 through 0.5.0b1 Name Shadowing of Imported Constants and Default Arguments
CVE-2020-37288Medium· 3.7Vyper: Return inside for loop more than 1 level deep
CVE-2020-37286Medium· 6.5Vyper 0.1.0b4 before 0.3.0 Memory Corruption via Nested Internal Function Calls
CVE-2020-37289Low· 3.7Vyper before 0.3.1 Improper Input Validation of uint8 Interface Return Values