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.

Project Subscriptions

Vendors Products
Open62541 Subscribe
Open62541 Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

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
Weaknesses CWE-190
CPEs cpe:2.3:a:open62541:open62541:*:*:*:*:*:*:*:*
Vendors & Products Open62541
Open62541 open62541
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.2, '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'}


Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-24T11:40:32.200Z

Reserved: 2026-10-24T11:23:55.329Z

Link: CVE-2026-116014

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-24T12:16:57.607

Modified: 2026-10-24T12:16:57.607

Link: CVE-2026-116014

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-24T13:00:14Z

Weaknesses