{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-4370", "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "state": "PUBLISHED", "assignerShortName": "canonical", "dateReserved": "2026-03-18T08:46:09.947Z", "datePublished": "2026-04-01T08:09:17.570Z", "dateUpdated": "2026-04-01T13:01:08.226Z"}, "containers": {"cna": {"title": "Improper TLS Client/Server authentication and certificate verification on Database Cluster", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-295", "description": "CWE-295 Improper certificate validation", "type": "CWE"}]}, {"descriptions": [{"lang": "en", "cweId": "CWE-306", "description": "CWE-306 Missing authentication for critical function", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-115", "descriptions": [{"lang": "en", "value": "CAPEC-115 Authentication Bypass"}]}, {"capecId": "CAPEC-94", "descriptions": [{"lang": "en", "value": "CAPEC-94 Adversary in the Middle (AiTM)"}]}], "affected": [{"vendor": "Canonical", "product": "Juju", "platforms": ["Linux"], "collectionURL": "https://github.com/juju/", "packageName": "juju", "repo": "https://github.com/juju/juju", "versions": [{"status": "affected", "version": "3.2.0", "lessThan": "3.6.20", "versionType": "semver"}, {"status": "affected", "version": "4.0", "lessThan": "4.0.4", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "A vulnerability was identified in Juju from version 3.2.0 until 3.6.19 and from version 4.0 until 4.0.4, where the internal Dqlite database cluster fails to perform proper TLS client and server authentication. Specifically, the Juju controller's database endpoint does not validate client certificates when a new node attempts to join the cluster. An unauthenticated attacker with network reachability to the Juju controller's Dqlite port can exploit this flaw to join the database cluster. Once joined, the attacker gains full read and write access to the underlying database, allowing for total data compromise."}], "references": [{"url": "https://github.com/juju/juju/security/advisories/GHSA-gvrj-cjch-728p"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseSeverity": "CRITICAL", "baseScore": 10, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"}}], "credits": [{"lang": "en", "value": "Harry Pidcock", "type": "finder"}, {"lang": "en", "value": "Joseph Phillips", "type": "remediation developer"}, {"lang": "en", "value": "Ian Booth", "type": "coordinator"}], "source": {"discovery": "INTERNAL"}, "providerMetadata": {"orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "shortName": "canonical", "dateUpdated": "2026-04-01T08:09:17.570Z"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-01T13:00:31.628747Z", "id": "CVE-2026-4370", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-01T13:01:08.226Z"}}]}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability was identified in Juju from version 3.2.0 until 3.6.19 and from version 4.0 until 4.0.4, where the internal Dqlite database cluster fails to perform proper TLS client and server authentication. Specifically, the Juju controller's database endpoint does not validate client certificates when a new node attempts to join the cluster. An unauthenticated attacker with network reachability to the Juju controller's Dqlite port can exploit this flaw to join the database cluster. Once joined, the attacker gains full read and write access to the underlying database, allowing for total data compromise."}], "id": "CVE-2026-4370", "lastModified": "2026-04-01T09:16:17.717", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 10.0, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 6.0, "source": "security@ubuntu.com", "type": "Secondary"}]}, "published": "2026-04-01T09:16:17.717", "references": [{"source": "security@ubuntu.com", "url": "https://github.com/juju/juju/security/advisories/GHSA-gvrj-cjch-728p"}], "sourceIdentifier": "security@ubuntu.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-295"}, {"lang": "en", "value": "CWE-306"}], "source": "security@ubuntu.com", "type": "Secondary"}]}

{}