CVE-2026-67856

{"id": "CVE-2026-67856", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-67856", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-05T18:49:57.259430Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"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"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "cve@mitre.org", "affectedData": [{"vendor": "n/a", "product": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}]}], "published": "2026-08-04T22:17:15.850", "references": [{"url": "https://github.com/open62541/open62541/blob/master/examples/access_control/server_access_control.c", "source": "cve@mitre.org"}, {"url": "https://github.com/open62541/open62541/blob/master/src/server/ua_services_subscription.c", "source": "cve@mitre.org"}, {"url": "https://github.com/open62541/open62541/blob/master/src/server/ua_subscription.c", "source": "cve@mitre.org"}, {"url": "https://github.com/open62541/open62541/blob/master/src/server/ua_subscription.h", "source": "cve@mitre.org"}, {"url": "https://github.com/open62541/open62541/issues/8092", "source": "cve@mitre.org"}, {"url": "https://github.com/open62541/open62541/issues/8092", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-400"}]}], "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"}], "lastModified": "2026-08-31T19:33:11.197", "sourceIdentifier": "cve@mitre.org"}