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.
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Affected Vendors & Products
Advisories
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Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Sat, 24 Oct 2026 11:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | open62541 1.5.0 before 1.5.7 Integer Overflow Heap Buffer Overflow via Custom DataType | |
| First Time appeared |
Open62541
Open62541 open62541 |
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| Weaknesses | CWE-190 | |
| CPEs | cpe:2.3:a:open62541:open62541:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Open62541
Open62541 open62541 |
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| References |
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| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-10-24T11:40:32.200Z
Reserved: 2026-10-24T11:23:55.329Z
Link: CVE-2026-116014
No data.
Status : Received
Published: 2026-10-24T12:16:57.607
Modified: 2026-10-24T12:16:57.607
Link: CVE-2026-116014
No data.
OpenCVE Enrichment
Updated: 2026-10-24T13:00:14Z
Weaknesses