CVE-2026-67856

Summary

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

Affected Software

Weaknesses

• n/a

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: yes
  • Technical Impact: partial

Additional References

• https://github.com/open62541/open62541/issues/8092

References

• https://github.com/open62541/open62541/issues/8092
• 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/blob/master/examples/access_control/server_access_control.c

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