Vulnerability Description
In open62541 v1.5.5, the server-side AddReferences implementation contains an incomplete validation flaw for non-local ExpandedNodeId targets. A remote attacker can send a crafted AddReferencesRequest with an empty targetServerUri and a non-zero targetNodeId.serverIndex, causing the target node pointer to remain NULL while execution continues.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/open62541/open62541/blob/v1.5.5/include/open62541/types.h
- https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_services_nodema
- https://github.com/open62541/open62541/blob/v1.5.5/src/ua_types.c
- https://github.com/open62541/open62541/issues/8172
- https://github.com/open62541/open62541/issues/8172
FAQ
What is CVE-2026-67870?
CVE-2026-67870 is a vulnerability with a CVSS score of 9.8 (CRITICAL). In open62541 v1.5.5, the server-side AddReferences implementation contains an incomplete validation flaw for non-local ExpandedNodeId targets. A remote attacker can send a crafted AddReferencesRequest...
How severe is CVE-2026-67870?
CVE-2026-67870 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-67870?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.