CVE-2026-116014

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.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/open62541/open62541/blob/v1.5.6/src/ua_types_definition.c#L274
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/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

Configurations

No configuration.

History

24 Oct 2026, 12:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-24 12:16

Updated : 2026-10-29 17:18

NVD link : CVE-2026-116014

Mitre link : CVE-2026-116014

CVE.ORG link : CVE-2026-116014

JSON object : View

Products Affected

No product.

CWE

CWE-190

Integer Overflow or Wraparound

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