CVE-2026-114114 (GCVE-0-2026-114114)

Vulnerability from cvelistv5 – Published: 2026-10-21 00:37 – Updated: 2026-10-21 00:37
VLAI
Title
Vyper through 0.5.0b1 Literal Value Substitution via Multi-byte Characters
Summary
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.
Severity
6 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
5.3 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
CWE
  • CWE-176 - Improper Handling of Unicode Encoding
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 6798 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
vyperlang vyper Affected: 0.1.0b1 , < 0.1.0b12 (python)
Unaffected: 0.1.0b12 (python)
guessed Create a notification for this product.
vyperlang vyper Affected: 0.1.0b14 , < 0.1.0b15 (python)
Unaffected: 0.1.0b15 (python)
guessed Create a notification for this product.
vyperlang vyper Affected: 0.4.1 , ≤ 0.5.0b1 (python)
guessed Create a notification for this product.
Date Public
2026-10-06 00:00
Credits
hyeon-Sec
Show details on NVD website
To clipboard 

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}



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