{"schema":"threatline.record/2","record":{"id":"CVE-2026-114114","aliases":["GHSA-r3c7-7xwm-6vfw"],"summary":"Vyper through 0.5.0b1 Literal Value Substitution via Multi-byte Characters","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.","categories":["Unclassified"],"product":"vyper","vendor":"vyperlang","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-114114","source_modified_at":"2026-10-21T00:37:12.518Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"vyper","vendor":"vyperlang","versions":[{"version":"0.1.0b1","status":"affected","versionType":"python","lessThan":"0.1.0b12"},{"version":"0.1.0b12","status":"unaffected","versionType":"python"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-114114","source_modified_at":"2026-10-21T00:37:12.518Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"vyper","vendor":"vyperlang","versions":[{"version":"0.1.0b14","status":"affected","versionType":"python","lessThan":"0.1.0b15"},{"version":"0.1.0b15","status":"unaffected","versionType":"python"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-114114","source_modified_at":"2026-10-21T00:37:12.518Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"vyper","vendor":"vyperlang","versions":[{"version":"0.4.1","status":"affected","versionType":"python","lessThanOrEqual":"0.5.0b1"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-114114","source_modified_at":"2026-10-21T00:37:12.518Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"vyper","ecosystem":null},"version":"0.1.0b12","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-114114","source_modified_at":"2026-10-21T00:37:12.518Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"vyper","ecosystem":null},"version":"0.1.0b15","basis":"first unaffected version stated in the CVE record"}],"cvss":6,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00183,"percentile":0.07475,"score_date":"2026-10-23"},"published_at":"2026-10-21T00:37:12.518Z","modified_at":"2026-10-21T00:37:12.518Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-114114","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-21T00:37:12.518Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-114114","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/vyperlang/vyper/security/advisories/GHSA-r3c7-7xwm-6vfw","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/vyper-through-0.5-0b1-literal-value-substitution-via-multi-byte-characters","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-21T00:37:12.518Z","content_hash":"2788b7e48c416540b3b946ce67056bd7bc6604d8bc7b55c378c6a786d1c48b3f"}}