{"cve":"CVE-2026-4370","nvd":{"published":"2026-04-01T09:16:17.717","modified":"2026-10-26T21:10:00.170","status":"Analyzed","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","score":10.0},"cwes":["CWE-295","CWE-306"],"references":["https://github.com/juju/juju/security/advisories/GHSA-gvrj-cjch-728p"],"products":["canonical:juju"],"source":"nvd","synced_at":"2026-10-26T21:38:48.864438205+00:00"},"epss":{"cve":"CVE-2026-4370","score":0.00381,"percentile":0.31869,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-gvrj-cjch-728p","url":"https://osv.dev/vulnerability/GHSA-gvrj-cjch-728p","summary":"Juju has Improper TLS Client/Server authentication and certificate verification on Database Cluster","modified":"2026-07-21T14:46:36Z","packages":[{"ecosystem":"Go","name":"github.com/juju/juju","purl":"pkg:golang/github.com/juju/juju","ranges":["<=0.0.0-20260401092550-1c1ac1922b57"],"fixed":[]}]},{"id":"GO-2026-5405","url":"https://osv.dev/vulnerability/GO-2026-5405","summary":"Juju has Improper TLS Client/Server authentication and certificate verification on Database Cluster in github.com/juju/juju","modified":"2026-06-25T23:00:54.618697541Z","packages":[{"ecosystem":"Go","name":"github.com/juju/juju","purl":"pkg:golang/github.com/juju/juju","ranges":["all versions"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}