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01 Record

CVE-2026-114114

Vyper through 0.5.0b1 Literal Value Substitution via Multi-byte Characters

MediumPUBLISHEDCNA: VulnCheck
CNA base score6.0 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

02 Description

Vyper through 0.5.0b1 Literal Value Substitution via Multi-byte Characters

03 Exploitation and scoring

Exploitation
Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.
SSVC decision
  • ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.18% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 7.4% of scored records. A rank, not a probability.
NVD base score
6.0 (CVSS v4.0), scored by the NVD independently of the CNA.
NVD CVSS vector
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD analysis status
Deferred. NVD last modified this record on 2026-10-28.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-10-21 00:37Z8 DAYS AGO
Last updated
2026-10-28 16:17Z18 HR AGO
Reserved
2026-10-20
Assigning CNA
VulnCheck
Record state
PUBLISHED
Severity
Medium (CVSS 6.0)
CNA CVSS vector
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
Weaknesses
  • CWE-176Improper Handling of Unicode EncodingVariant
  • CWE-1007Insufficient Visual Distinction of Homoglyphs Presented to UserBase
Data version
5.2
Document digest
884c288f75599eb6e28ae13ae7ac76763a17daa6a7c264021d6c870df58fb7e1

05 Affected products

VendorProductVersionsPlatforms
vyperlangvyper0.1.0b1 to < 0.1.0b12, 0.1.0b14 to < 0.1.0b15, 0.4.1 to 0.5.0b1—

06 References