CVE-2026-67870

State: Published
Severity: 9.8 Critical
Published: Aug 5, 2026
Updated: Aug 6, 2026
Reserved: Jul 30, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-476 NULL Pointer Dereference

Affected Products

Product	Versions
n/an/a	n/aAffected

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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