{"id":"CVE-2026-116014","revision":null,"records":[{"revision":"90d40b3fc9334c5d9fe4e47cf4d289ef","observedAt":"2026-10-24T13:07:03.442+00:00","statement":{"source":"cve-program","id":"CVE-2026-116014","aliases":[],"title":"open62541 1.5.0 before 1.5.7 Integer Overflow Heap Buffer Overflow via Custom DataType","description":"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.","state":0,"publishedAt":"2026-10-24T11:40:32.2+00:00","modifiedAt":"2026-10-24T11:40:32.2+00:00","affected":[{"ecosystem":"Vendor product","name":"open62541","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"open62541\",\n                    \"product\": \"open62541\",\n                    \"packageURL\": \"pkg:github/open62541/open62541\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"1.5.0\",\n                            \"lessThan\": \"1.5.7\",\n                            \"versionType\": \"semver\",\n                            \"status\": \"affected\"\n                        }\n                    ],\n                    \"repo\": \"https://github.com/open62541/open62541\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":9.2,"severity":"CRITICAL"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.1,"severity":"HIGH"}],"references":["https://github.com/open62541/open62541/commit/0cf4806768c493bc6ccffcd4419da24153b970ec","https://github.com/open62541/open62541/pull/8298","https://github.com/open62541/open62541/pull/8302","https://github.com/open62541/open62541/blob/v1.5.6/src/ua_types_definition.c#L274","https://github.com/open62541/open62541/releases/tag/v1.5.7","https://www.vulncheck.com/advisories/open62541-1.5.0-before-1.5.7-integer-overflow-heap-buffer-overflow-via-custom-datatype"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116014","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-116014","identifiers":["CVE-2026-116014"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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