{"id":"CVE-2026-67856","state":"PUBLISHED","title":"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, TransferSubs","description":"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","publishedAt":"2026-08-04T00:00:00.000Z","updatedAt":"2026-08-05T18:50:49.774Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"mitre","products":["n/a n/a"],"affected":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}],"references":["https://github.com/open62541/open62541/issues/8092","https://github.com/open62541/open62541/blob/master/src/server/ua_services_subscription.c","https://github.com/open62541/open62541/blob/master/src/server/ua_subscription.c","https://github.com/open62541/open62541/blob/master/src/server/ua_subscription.h","https://github.com/open62541/open62541/blob/master/examples/access_control/server_access_control.c"],"weaknesses":["CWE-400"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/67xxx/CVE-2026-67856.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-67856","state":"PUBLISHED","datePublished":"2026-08-04T00:00:00.000Z","dateUpdated":"2026-08-05T18:50:49.774Z","assignerShortName":"mitre","assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateReserved":"2026-07-30T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"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"}],"affected":[{"vendor":"n/a","product":"n/a","versions":[{"version":"n/a","status":"affected"}]}],"references":[{"url":"https://github.com/open62541/open62541/issues/8092"},{"url":"https://github.com/open62541/open62541/blob/master/src/server/ua_services_subscription.c"},{"url":"https://github.com/open62541/open62541/blob/master/src/server/ua_subscription.c"},{"url":"https://github.com/open62541/open62541/blob/master/src/server/ua_subscription.h"},{"url":"https://github.com/open62541/open62541/blob/master/examples/access_control/server_access_control.c"}],"problemTypes":[{"descriptions":[{"type":"text","lang":"en","description":"n/a"}]}],"providerMetadata":{"shortName":"mitre","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateUpdated":"2026-08-04T21:17:32.989Z"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/open62541/open62541/issues/8092","tags":["exploit"]}],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.5,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-08-05T18:49:57.259430Z","id":"CVE-2026-67856","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","type":"CWE","lang":"en","description":"CWE-400 Uncontrolled Resource Consumption"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-05T18:50:49.774Z"}}]}}}