CVE-2026-67870

Summary

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.

Affected Software

Weaknesses

• n/a

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: total

Additional References

• https://github.com/open62541/open62541/issues/8172

References

• https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_services_nodemanagement.c
• https://github.com/open62541/open62541/issues/8172
• https://github.com/open62541/open62541/blob/v1.5.5/include/open62541/types.h
• https://github.com/open62541/open62541/blob/v1.5.5/src/ua_types.c

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