{"id":"CVE-2026-114115","revision":"4260f06f6e9a4c29ad162bc97414efc3","records":[{"revision":"4260f06f6e9a4c29ad162bc97414efc3","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-114115","aliases":[],"title":"Vyper 0.3.8 through 0.5.0b1 Memory Misread via Ternary Nested Array Selection","description":"Vyper 0.3.8 through 0.5.0b1 contains a compiler miscompilation vulnerability in parse_IfExp that reads nested arrays with narrower inner bounds using the wider result type's memory layout. When a ternary selects the narrower array, inner arrays after the first are read at wrong offsets, causing contracts to silently store corrupted values or revert.","state":0,"publishedAt":"2026-10-21T00:37:13.251+00:00","modifiedAt":"2026-10-21T15:49:19.495+00:00","affected":[{"ecosystem":"Vendor product","name":"vyper","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"vyperlang\",\n                    \"product\": \"vyper\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:pypi/vyper\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0.3.8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"python\",\n                            \"lessThanOrEqual\": \"0.5.0b1\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","score":6.3,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","score":3.7,"severity":"LOW"}],"references":["https://github.com/vyperlang/vyper/security/advisories/GHSA-cw3h-xwxq-8cx2","https://github.com/vyperlang/vyper/commit/1fb7dfe2","https://www.vulncheck.com/advisories/vyper-0.3.8-through-0.5-0b1-memory-misread-via-ternary-nested-array-selection"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-114115","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-114115","identifiers":["CVE-2026-114115"]},"retained":false,"historicalAffected":[]}],"coverage":[]}