Critical severity9.8NVD Advisory· Published Aug 6, 2026· Updated Aug 31, 2026

CVE-2026-67870

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Open62541/Open62541llm-fuzzy
Range: <1.5.5

Patches

Vulnerability mechanics

References

github.com/open62541/open62541/blob/v1.5.5/include/open62541/types.hnvd
github.com/open62541/open62541/blob/v1.5.5/src/server/ua_services_nodemanagement.cnvd
github.com/open62541/open62541/blob/v1.5.5/src/ua_types.cnvd
github.com/open62541/open62541/issues/8172nvd

News mentions

Open62541: 14 Critical and High-Severity Vulnerabilities Disclosed Together
Vypr Intelligence · Aug 6, 2026

cvss	0.637
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000