CVE-2026-67863

State: Published
Severity: 7.5 High
Published: Aug 5, 2026
Updated: Aug 7, 2026
Reserved: Jul 30, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:N	mitre

Weaknesses

CWE-416 Use After Free

Affected Products

Product	Versions
n/an/a	n/aAffected

References

https://github.com/open62541/open62541/issues/8131
https://github.com/open62541/open62541/blob/v1.5.5/include/open62541/server.h
https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_subscription.c
https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_services_monitoreditem.c

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