{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0.4.1"
                  },
                  {
                    "last_affected": "0.5.0b1"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          },
          "events": [
            {
              "introduced": "8a93dd27de503b0a3ace36d961a10c9ea4adee8b"
            },
            {
              "last_affected": "577d2534356903076bb79b5b15ebd4d772994693"
            }
          ],
          "repo": "https://github.com/vyperlang/vyper",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-r3c7-7xwm-6vfw"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-176"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/114xxx/CVE-2026-114114.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "range": [
              {
                "introduced": "0.1.0b1"
              },
              {
                "fixed": "0.1.0b12"
              },
              {
                "introduced": "0.1.0b14"
              },
              {
                "fixed": "0.1.0b15"
              }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
          }
        ]
      }
    ]
  },
  "details": "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.",
  "id": "CVE-2026-114114",
  "modified": "2026-10-21T10:30:59.617006673Z",
  "published": "2026-10-21T00:37:12.518Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/114xxx/CVE-2026-114114.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/vyperlang/vyper/security/advisories/GHSA-r3c7-7xwm-6vfw"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-114114"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/vyper-through-0.5-0b1-literal-value-substitution-via-multi-byte-characters"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Vyper through 0.5.0b1 Literal Value Substitution via Multi-byte Characters"
}