MEDIUM 6.0 NVD
CVE-2026-114114
Vyper 0.1.0b1 before 0.1.0b12, 0.1.0b14, and 0.4.1 through 0.5.0b1 mix character-based line offsets with Python's UTF-8 byte col_offset values in vyper/ast/pars
Vyper 0.1.0b1 before 0.1.0b12, 0.1.0b14, and 0.4.1 through 0.5.0b1 mix character-based line offsets with Python's UTF-8 byte col_offset values in vyper/ast/parse.py, so multi-byte characters shift the source slices used to reconstruct later numeric literals. An attacker contributing source with non-ASCII identifiers that NFKC-normalize to ASCII, or an invisible byte-order mark, can silently substitute addresses, integers or other constants in compiled code.
References
- https://github.com/vyperlang/vyper/security/advisories/GHSA-r3c7-7xwm-6vfw
- https://www.vulncheck.com/advisories/vyper-through-0.5-0b1-literal-value-substitution-via-
This medium severity vulnerability with a CVSS score of 6.0 was published on 2026-10-21 via NVD.
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