open62541 1.5.0 before 1.5.7 Integer Overflow Heap Buffer Overflow via Custom DataType
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.
CVE-2026-116014
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-116014
open62541
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/open62541/open62541",
"vendor": "open62541",
"product": "open62541",
"versions": [
{
"status": "affected",
"version": "1.5.0",
"lessThan": "1.5.7",
"versionType": "semver"
}
],
"packageURL": "pkg:github/open62541/open62541",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-116014
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #55817 · Revision 1
- Added to Heist Feed
- Publisher date