{"id":"UBUNTU-CVE-2026-67870","details":"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.","modified":"2026-08-13T00:13:02Z","published":"2026-08-06T00:16:00Z","upstream":["CVE-2026-67870"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-67870"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-67870"},{"type":"REPORT","url":"https://github.com/open62541/open62541/issues/8172"},{"type":"REPORT","url":"https://github.com/open62541/open62541/blob/v1.5.5/include/open62541/types.h"},{"type":"REPORT","url":"https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_services_nodemanagement.c"},{"type":"REPORT","url":"https://github.com/open62541/open62541/blob/v1.5.5/src/ua_types.c"}],"affected":[{"package":{"name":"open62541","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/open62541?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.11.1-1","1.4.11.1-1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.4.11.1-1build1","binary_name":"libopen62541-1.4"},{"binary_version":"1.4.11.1-1build1","binary_name":"libopen62541-1.4-tools"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-67870.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}