🛡️ CVE-2026-4370
🔴 CVSS 10.0 — Critical ✅ No Known Exploit CWE-287 NVD
10.0
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity CRITICAL
CVSS Score 10.0
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CWE CWE-287
Public Exploit ✅ No
Source NVD
Published 2026-04-02
Updated 2026-06-02
Modified 2026-04-08
Fix URL N/A

Affected Packages

Software From version Fixed in
github.com/juju/juju — —
juju 4.0 4.0.5

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