{"id":"CVE-2026-67863","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-67863","generatedAt":"2026-10-28T11:56:29.998Z","title":"In open62541 1.5.5, a server-side use-after-free exists in the local MonitoredItem callback path.","description":"In open62541 1.5.5, a server-side use-after-free exists in the local MonitoredItem callback path. The issue occurs when UA_Subscription_localPublish continues to use the current UA_Notification after a callback invokes UA_Server_deleteMonitoredItem for the current local MonitoredItem. This allows a remote attacker to cause a denial of service.","published":"2026-08-05T23:16:54.000Z","lastModified":"2026-08-31T19:33:11.000Z","status":"Deferred","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-416"],"affected":[],"epss":{"score":0.00737,"percentile":0.54307,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.74%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/open62541/open62541/blob/v1.5.5/include/open62541/server.h","source":"cve@mitre.org"},{"url":"https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_services_monitoreditem.c","source":"cve@mitre.org"},{"url":"https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_subscription.c","source":"cve@mitre.org"},{"url":"https://github.com/open62541/open62541/issues/8131","source":"cve@mitre.org"},{"url":"https://github.com/open62541/open62541/issues/8131","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-67863","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}