Paper/Archive/CVE-2026-67870

CVE-2026-67870

mitre — In open62541 v1.5.5, the server-side AddReferences implementation contains an incomplete validation flaw for non-local ExpandedNodeId tar…

EPSS 1%public exploit CVSS 9.8

critical.is priorityof 100

CVSS 9.8 (ADP)9.8 / 10 × 3029.4 Not in CISA KEV+300.0 EPSS percentile 64.7.647 × 2012.9 Exploit: SSVC poc+1010.0 SSVC exploitation: poc+100.0

Description · from the CVE record

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

ProductAffectedFixed inSource

n/an/a–CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: total

References

refgithub.com/open62541/open62541/blob/v1.5.5/src/server/ua_services_nodemanagement.c exploitgithub.com/open62541/open62541/issues/8172 refgithub.com/open62541/open62541/blob/v1.5.5/include/open62541/types.h refgithub.com/open62541/open62541/blob/v1.5.5/src/ua_types.c