{"id":"UBUNTU-CVE-2026-67856","details":"An issue in open62541 v.1.5.5 and before allows a remote attacker to cause a denial of service via crafted CreateSubscription, CreateMonitoredItems(Sampling), Publish, TransferSubscriptions, and DeleteSubscriptions requests","modified":"2026-08-06T22:15:45.975503367Z","published":"2026-08-04T22:17:00Z","upstream":["CVE-2026-67856"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-67856"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-67856"},{"type":"REPORT","url":"https://github.com/open62541/open62541/issues/8092"},{"type":"REPORT","url":"https://github.com/open62541/open62541/blob/master/examples/access_control/server_access_control.c"},{"type":"REPORT","url":"https://github.com/open62541/open62541/blob/master/src/server/ua_services_subscription.c"},{"type":"REPORT","url":"https://github.com/open62541/open62541/blob/master/src/server/ua_subscription.c"},{"type":"REPORT","url":"https://github.com/open62541/open62541/blob/master/src/server/ua_subscription.h"}],"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_name":"libopen62541-1.4","binary_version":"1.4.11.1-1build1"},{"binary_name":"libopen62541-1.4-tools","binary_version":"1.4.11.1-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-67856.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}