{"schema":"threatline.record/2","record":{"id":"CVE-2026-116014","aliases":[],"summary":"open62541 1.5.0 before 1.5.7 Integer Overflow Heap Buffer Overflow via Custom DataType","details":"open62541 1.5.0 before 1.5.7 contains an integer overflow in UA_DataType_fromStructureDescription() that wraps the 16-bit memSize field for large custom structure definitions. A malicious OPC UA server can supply DataType definitions via UA_Client_getRemoteDataTypes(), causing decodeBinaryStructure() to overflow the heap, crashing clients or enabling code execution.","categories":["Unclassified"],"product":"open62541","vendor":"open62541","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-116014","source_modified_at":"2026-10-24T11:40:32.200Z","fetched_at":"2026-10-24T14:26:37.433577Z","product":"open62541","vendor":"open62541","versions":[{"version":"1.5.0","lessThan":"1.5.7","versionType":"semver","status":"affected"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-116014","source_modified_at":"2026-10-24T11:40:32.200Z","fetched_at":"2026-10-24T14:26:37.433577Z","package":{"name":"open62541","ecosystem":null},"version":"1.5.7","basis":"first unaffected version stated in the CVE record"}],"cvss":9.2,"severity":"Critical","kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-24T11:40:32.200Z","modified_at":"2026-10-24T11:40:32.200Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-116014","fetched_at":"2026-10-24T14:26:37.433577Z","source_modified_at":"2026-10-24T11:40:32.200Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://github.com/open62541/open62541/commit/0cf4806768c493bc6ccffcd4419da24153b970ec","tags":["patch"]},{"source":"CVE List","url":"https://github.com/open62541/open62541/pull/8298","tags":["patch","issue-tracking"]},{"source":"CVE List","url":"https://github.com/open62541/open62541/pull/8302","tags":["patch","issue-tracking"]},{"source":"CVE List","url":"https://github.com/open62541/open62541/blob/v1.5.6/src/ua_types_definition.c#L274","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/open62541/open62541/releases/tag/v1.5.7","tags":["release-notes"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/open62541-1.5.0-before-1.5.7-integer-overflow-heap-buffer-overflow-via-custom-datatype","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":"2026-10-24T11:40:32.200Z","content_hash":"60474114a5572a7a8a43c07ff2e9098ec458f31c016ebe5e14132c7aeaa28be2"}}