PT-2026-29482 · Canonical · Juju

Harry Pidcock + 2 · Published 2026-04-01 · Updated 2026-04-01 · CVE-2026-4370

Mitre

CVSS v3.1

10

Critical

AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

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.

Fix

Improper Certificate Validation

Missing Authentication

Weakness Enumeration

CWE-295

CWE-306

Related Identifiers

CVE-2026-4370

Affected Products

Juju

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-4370 · Security Note
• https://github.com/juju/juju/security/advisories/GHSA-gvrj-cjch-728p · Note