CVE-2026-67856

Description

An issue in open62541 v.1.5.5 and before allows a remote attacker to cause a denial of service via crafted CreateSubscription, CreateMonitoredItems(Sampling), Publish, TransferSubscriptions, and DeleteSubscriptions requests

References

• https://github.com/open62541/open62541/blob/master/examples/access_control/server_access_control.c
• https://github.com/open62541/open62541/blob/master/src/server/ua_services_subscription.c
• https://github.com/open62541/open62541/blob/master/src/server/ua_subscription.c
• https://github.com/open62541/open62541/blob/master/src/server/ua_subscription.h
• https://github.com/open62541/open62541/issues/8092