{"id":"CVE-2026-116014","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-116014","summary":"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…","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.","published":"2026-10-24T12:16:57.607","modified":"2026-10-24T12:16:57.607","cvss":{"score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/open62541/open62541/commit/0cf4806768c493bc6ccffcd4419da24153b970ec","label":"open62541/open62541@0cf4806"},"references":[{"type":"WEB","url":"https://github.com/open62541/open62541/blob/v1.5.6/src/ua_types_definition.c#L274"},{"type":"WEB","url":"https://github.com/open62541/open62541/commit/0cf4806768c493bc6ccffcd4419da24153b970ec"},{"type":"WEB","url":"https://github.com/open62541/open62541/pull/8298"},{"type":"WEB","url":"https://github.com/open62541/open62541/pull/8302"},{"type":"WEB","url":"https://github.com/open62541/open62541/releases/tag/v1.5.7"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/open62541-1.5.0-before-1.5.7-integer-overflow-heap-buffer-overflow-via-custom-datatype"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-10-24T12:16:57.607"}}