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Vulnerable Software

Vulnerability Details CVE-2026-4370

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 10.2%
CVSS Severity
CVSS v3 Score 10.0
Products affected by CVE-2026-4370
  • Canonical » Juju » Version: 3.3
    cpe:2.3:a:canonical:juju:3.3
  • Canonical » Juju » Version: 3.3.0
    cpe:2.3:a:canonical:juju:3.3.0
  • Canonical » Juju » Version: 3.3.1
    cpe:2.3:a:canonical:juju:3.3.1
  • Canonical » Juju » Version: 3.3.2
    cpe:2.3:a:canonical:juju:3.3.2
  • Canonical » Juju » Version: 3.3.3
    cpe:2.3:a:canonical:juju:3.3.3
  • Canonical » Juju » Version: 3.3.4
    cpe:2.3:a:canonical:juju:3.3.4
  • Canonical » Juju » Version: 3.3.5
    cpe:2.3:a:canonical:juju:3.3.5
  • Canonical » Juju » Version: 3.3.6
    cpe:2.3:a:canonical:juju:3.3.6
  • Canonical » Juju » Version: 3.3.7
    cpe:2.3:a:canonical:juju:3.3.7
  • Canonical » Juju » Version: 3.4
    cpe:2.3:a:canonical:juju:3.4
  • Canonical » Juju » Version: 3.4.1
    cpe:2.3:a:canonical:juju:3.4.1
  • Canonical » Juju » Version: 3.4.2
    cpe:2.3:a:canonical:juju:3.4.2
  • Canonical » Juju » Version: 3.4.3
    cpe:2.3:a:canonical:juju:3.4.3
  • Canonical » Juju » Version: 3.4.4
    cpe:2.3:a:canonical:juju:3.4.4
  • Canonical » Juju » Version: 3.4.5
    cpe:2.3:a:canonical:juju:3.4.5
  • Canonical » Juju » Version: 3.4.6
    cpe:2.3:a:canonical:juju:3.4.6
  • Canonical » Juju » Version: 3.5
    cpe:2.3:a:canonical:juju:3.5
  • Canonical » Juju » Version: 3.5.0
    cpe:2.3:a:canonical:juju:3.5.0
  • Canonical » Juju » Version: 3.5.1
    cpe:2.3:a:canonical:juju:3.5.1
  • Canonical » Juju » Version: 3.5.2
    cpe:2.3:a:canonical:juju:3.5.2
  • Canonical » Juju » Version: 3.5.3
    cpe:2.3:a:canonical:juju:3.5.3
  • Canonical » Juju » Version: 3.5.4
    cpe:2.3:a:canonical:juju:3.5.4
  • Canonical » Juju » Version: 3.5.5
    cpe:2.3:a:canonical:juju:3.5.5
  • Canonical » Juju » Version: 3.5.6
    cpe:2.3:a:canonical:juju:3.5.6
  • Canonical » Juju » Version: 3.5.7
    cpe:2.3:a:canonical:juju:3.5.7
  • Canonical » Juju » Version: 3.6
    cpe:2.3:a:canonical:juju:3.6
  • Canonical » Juju » Version: 4.0
    cpe:2.3:a:canonical:juju:4.0


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