Vulnerability 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 Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Canonical | Juju | >= 3.2.0, < 3.6.20 |
Related Weaknesses (CWE)
References
- https://github.com/juju/juju/security/advisories/GHSA-gvrj-cjch-728pExploitVendor Advisory
FAQ
What is CVE-2026-4370?
CVE-2026-4370 is a vulnerability with a CVSS score of 10.0 (CRITICAL). 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 authen...
How severe is CVE-2026-4370?
CVE-2026-4370 has been rated CRITICAL with a CVSS base score of 10.0/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-4370?
Check the references section above for vendor advisories and patch information. Affected products include: Canonical Juju.