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.
History

Thu, 02 Apr 2026 20:30:00 +0000

Type Values Removed Values Added
First Time appeared Canonical
Canonical juju
CPEs cpe:2.3:a:canonical:juju:*:*:*:*:*:*:*:*
Vendors & Products Canonical
Canonical juju

Wed, 01 Apr 2026 23:45:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 01 Apr 2026 08:45:00 +0000

Type Values Removed Values Added
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.
Title Improper TLS Client/Server authentication and certificate verification on Database Cluster
Weaknesses CWE-295
CWE-306
References
Metrics cvssV3_1

{'score': 10, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: canonical

Published: 2026-04-01T08:09:17.570Z

Updated: 2026-04-01T13:01:08.226Z

Reserved: 2026-03-18T08:46:09.947Z

Link: CVE-2026-4370

cve-icon Vulnrichment

Updated: 2026-04-01T13:00:43.615Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-01T09:16:17.717

Modified: 2026-04-02T20:24:48.797

Link: CVE-2026-4370

cve-icon Redhat

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