Vulnerability DatabaseCVE-2026-67863
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CVE-2026-67863
Published:August 05, 2026
Updated:August 06, 2026
In open62541 1.5.5, a server-side use-after-free exists in the local MonitoredItem callback path. The issue occurs when UA_Subscription_localPublish continues to use the current UA_Notification after a callback invokes UA_Server_deleteMonitoredItem for the current local MonitoredItem. This allows a remote attacker to cause a denial of service.
Related Resources (4)
https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_services_monitoreditem.c
https://github.com/open62541/open62541/blob/v1.5.5/include/open62541/server.h
https://github.com/open62541/open62541/issues/8131
https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_subscription.c
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Complexity
LOW
Attack Vector
NETWORK
Availability
HIGH
Confidentiality
NONE
Integrity
NONE
Privileges Required
NONE
Scope
UNCHANGED
User Interaction
NONE