Vyper through 0.5.0b1 Literal Value Substitution via Multi-byte Characters
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.
CVE-2026-114114
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-114114
vyper
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
vyper
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
vyper
Source reference: /containers/cna/affected/2/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "vyperlang",
"product": "vyper",
"versions": [
{
"status": "affected",
"version": "0.1.0b1",
"lessThan": "0.1.0b12",
"versionType": "python"
},
{
"status": "unaffected",
"version": "0.1.0b12",
"versionType": "python"
}
],
"packageURL": "pkg:pypi/vyper",
"defaultStatus": "unaffected"
},
{
"vendor": "vyperlang",
"product": "vyper",
"versions": [
{
"status": "affected",
"version": "0.1.0b14",
"lessThan": "0.1.0b15",
"versionType": "python"
},
{
"status": "unaffected",
"version": "0.1.0b15",
"versionType": "python"
}
],
"packageURL": "pkg:pypi/vyper",
"defaultStatus": "unaffected"
},
{
"vendor": "vyperlang",
"product": "vyper",
"versions": [
{
"status": "affected",
"version": "0.4.1",
"versionType": "python",
"lessThanOrEqual": "0.5.0b1"
}
],
"packageURL": "pkg:pypi/vyper",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-114114
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #44982 · Revision 1
- Added to Heist Feed
- Publisher date