{"api_version":"1","generated_at":"2026-08-04T23:55:28+00:00","cve":"CVE-2026-67857","urls":{"html":"https://cve.report/CVE-2026-67857","api":"https://cve.report/api/cve/CVE-2026-67857.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-67857","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-67857"},"summary":{"title":"CVE-2026-67857","description":"open62541 1.5.5 contains an out-of-bounds read in the client-side function responseReadNamespacesArray() in src/client/ua_client_connect.c.","state":"PUBLISHED","assigner":"mitre","published_at":"2026-08-04 22:17:15","updated_at":"2026-08-04 22:17:15"},"problem_types":["n/a"],"metrics":[{"version":"3.1","source":"cve@mitre.org","type":"Secondary","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","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:N","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:N","version":"3.1"}}],"references":[{"url":"https://github.com/open62541/open62541/blob/v1.5.5/examples/client_connect_loop.c","name":"https://github.com/open62541/open62541/blob/v1.5.5/examples/client_connect_loop.c","refsource":"cve@mitre.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/gff-cw/information/issues/9","name":"https://github.com/gff-cw/information/issues/9","refsource":"cve@mitre.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/open62541/open62541/issues/8104","name":"https://github.com/open62541/open62541/issues/8104","refsource":"cve@mitre.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/open62541/open62541/blob/v1.5.5/examples/client_connect.c","name":"https://github.com/open62541/open62541/blob/v1.5.5/examples/client_connect.c","refsource":"cve@mitre.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/open62541/open62541/blob/v1.5.5/src/client/ua_client_connect.c","name":"https://github.com/open62541/open62541/blob/v1.5.5/src/client/ua_client_connect.c","refsource":"cve@mitre.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-67857","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67857","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"n/a","product":"n/a","version":"affected n/a","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}],"descriptions":[{"lang":"en","value":"open62541 1.5.5 contains an out-of-bounds read in the client-side function responseReadNamespacesArray() in src/client/ua_client_connect.c."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"description":"n/a","lang":"en","type":"text"}]}],"providerMetadata":{"dateUpdated":"2026-08-04T21:21:25.605Z","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","shortName":"mitre"},"references":[{"url":"https://github.com/open62541/open62541/issues/8104"},{"url":"https://github.com/open62541/open62541/blob/v1.5.5/src/client/ua_client_connect.c"},{"url":"https://github.com/open62541/open62541/blob/v1.5.5/examples/client_connect.c"},{"url":"https://github.com/open62541/open62541/blob/v1.5.5/examples/client_connect_loop.c"},{"url":"https://github.com/gff-cw/information/issues/9"}]}},"cveMetadata":{"assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","assignerShortName":"mitre","cveId":"CVE-2026-67857","datePublished":"2026-08-04T00:00:00.000Z","dateReserved":"2026-07-30T00:00:00.000Z","dateUpdated":"2026-08-04T21:21:25.605Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-04 22:17:15","lastModifiedDate":"2026-08-04 22:17:15","problem_types":["n/a"],"metrics":{"cvssMetricV31":[{"source":"cve@mitre.org","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"67857","Ordinal":"1","Title":"CVE-2026-67857","CVE":"CVE-2026-67857","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"67857","Ordinal":"1","NoteData":"open62541 1.5.5 contains an out-of-bounds read in the client-side function responseReadNamespacesArray() in src/client/ua_client_connect.c.","Type":"Description","Title":"CVE-2026-67857"}]}}}