{"id":"CVE-2026-114114","aliases":[],"cve":{"records":[{"id":"CVE-2026-114114","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-10-20T21:48:58.503Z","published":"2026-10-21T00:37:12.518Z","modified":"2026-10-28T16:17:33.395Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-10-21T00:37:12.518Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-10-28T16:17:33.395Z"}],"references":[{"url":"https://github.com/vyperlang/vyper/security/advisories/GHSA-r3c7-7xwm-6vfw","tags":["vendor-advisory"],"source":"VulnCheck"},{"url":"https://www.vulncheck.com/advisories/vyper-through-0.5-0b1-literal-value-substitution-via-multi-byte-characters","tags":["third-party-advisory"],"source":"VulnCheck"},{"url":"https://github.com/vyperlang/vyper/security/advisories/GHSA-r3c7-7xwm-6vfw","tags":["exploit"],"source":"CISA-ADP"}],"weaknesses":[{"id":"CWE-176","description":"Improper Handling of Unicode Encoding","source":"VulnCheck"}],"applicability":[{"source":"VulnCheck","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:vyperlang:vyper:*:*:*:*:*:*:*:*","versionStartIncluding":"0.1.0b1","versionEndExcluding":"0.1.0b12"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:vyperlang:vyper:*:*:*:*:*:*:*:*","versionStartIncluding":"0.1.0b14","versionEndExcluding":"0.1.0b15"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:vyperlang:vyper:*:*:*:*:*:*:*:*","versionStartIncluding":"0.4.1","versionEndIncluding":"0.5.0b1"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-10-28T16:16:34.586520Z","decisions":[{"name":"Exploitation","value":"poc"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"partial"}]}]},"title":"Vyper through 0.5.0b1 Literal Value Substitution via Multi-byte Characters","titleSource":"VulnCheck","descriptionSource":"VulnCheck","description":"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.","score":6,"severity":"medium","published":"2026-10-21T00:37:12.518Z","modified":"2026-10-28T16:17:33.395Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"vyperlang","name":"vyper","platforms":[],"versions":[{"version":"0.1.0b1","status":"affected","lessThan":"0.1.0b12","versionType":"python"},{"version":"0.1.0b12","status":"unaffected","versionType":"python"}],"defaultStatus":"unaffected","packageURL":"pkg:pypi/vyper","packageIdentity":{"ecosystem":"PyPI","name":"vyper"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-114114"},{"vendor":"vyperlang","name":"vyper","platforms":[],"versions":[{"version":"0.1.0b14","status":"affected","lessThan":"0.1.0b15","versionType":"python"},{"version":"0.1.0b15","status":"unaffected","versionType":"python"}],"defaultStatus":"unaffected","packageURL":"pkg:pypi/vyper","packageIdentity":{"ecosystem":"PyPI","name":"vyper"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-114114"},{"vendor":"vyperlang","name":"vyper","platforms":[],"versions":[{"version":"0.4.1","status":"affected","lessThanOrEqual":"0.5.0b1","versionType":"python"}],"defaultStatus":"unaffected","packageURL":"pkg:pypi/vyper","packageIdentity":{"ecosystem":"PyPI","name":"vyper"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-114114"}],"remediation":[],"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-multi-byte-characters"],"sources":[{"name":"CVE","id":"CVE-2026-114114","modified":"2026-10-28T16:17:33.395Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-114114"}],"assessments":[{"source":"VulnCheck","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","score":6},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N","score":5.3}],"sourceAffected":[],"observedAt":"2026-10-29T14:33:36.295Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T14:10:32.801Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-28T16:45:37.625Z","attemptedAt":"2026-10-28T16:45:37.625Z"},{"source":"GHSA","status":"available","checkedAt":"2026-10-28T16:45:38.429Z","attemptedAt":"2026-10-28T16:45:38.429Z"},{"source":"EUVD","status":"available","checkedAt":"2026-10-28T16:45:38.427Z","attemptedAt":"2026-10-28T16:45:38.427Z"},{"source":"EPSS","status":"available","checkedAt":"2026-10-28T16:45:37.307Z","attemptedAt":"2026-10-28T16:45:37.307Z"}],"evidence":[{"source":"FIRST EPSS","id":"CVE-2026-114114","url":"https://www.first.org/epss/","probability":0.00183,"percentile":0.07843,"date":"2026-10-28","checkedAt":"2026-10-28T16:45:37.307Z"},{"source":"NVD","id":"CVE-2026-114114","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-114114","modified":"2026-10-22T17:00:33.203","score":6,"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","checkedAt":"2026-10-28T16:45:37.625Z"},{"source":"NVD","id":"CVE-2026-114114","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-114114","modified":"2026-10-22T17:00:33.203","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N","checkedAt":"2026-10-28T16:45:37.625Z"},{"source":"ENISA EUVD","id":"EUVD-2026-106917","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-106917","modified":"Oct 21, 2026, 12:37:12 AM","score":6,"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","checkedAt":"2026-10-28T16:45:38.427Z"},{"source":"GitHub Advisory Database","id":"GHSA-vchg-h45q-h36m","url":"https://github.com/advisories/GHSA-vchg-h45q-h36m","modified":"2026-10-21T03:32:36Z","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N","checkedAt":"2026-10-28T16:45:38.429Z"}],"aiSummary":{"text":"Vyper through 0.5.0b1 has a weakness in handling Unicode encoding, allowing an attacker to substitute addresses or integers in compiled code by contributing source with non-ASCII identifiers. Affected versions include 0.1.0b1 before 0.1.0b12, 0.1.0b14, and 0.4.1 through 0.5.0b1. An attacker needs to contribute source code to exploit this vulnerability.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-30T09:21:26.800Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-114114"}]}}