vyperlang Vyper up to 0.1.0b11/0.4.1-0.5.0b1 ast vyper/ast/parse.py code injection

Summaryinfo

A vulnerability described as problematic has been identified in vyperlang Vyper up to 0.1.0b11/0.4.1-0.5.0b1. The affected element is an unknown function of the file vyper/ast/parse.py of the component ast. Executing a manipulation can lead to code injection. This vulnerability is handled as CVE-2026-114114. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic was found in vyperlang Vyper up to 0.1.0b11/0.4.1-0.5.0b1. This vulnerability affects an unknown code block of the file vyper/ast/parse.py of the component ast. The manipulation with an unknown input leads to a code injection vulnerability. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect integrity. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability was named CVE-2026-114114 since 10/20/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059 by the MITRE ATT&CK project.

Upgrading to version 0.1.0b12 or 0.5.0b1 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• vyperlang

Name

• Vyper

Version

• 0.1.0b11
• 0.4.1-0.5.0b1

Website

• Product: https://github.com/vyperlang/vyper/

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