What’s Vulnerable › Vulnerabilities

CVE-2026-67870

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-06 · updated 2026-08-31
• Weakness: CWE-476

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.

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_nodemanagement.c
• 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

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