CVE-2026-4370 identifies a critical authentication bypass vulnerability in Juju versions 3.2.0 through 3.6.19 and 4.0 through 4.0.4. This flaw allows an unauthenticated attacker with network reachability to the Juju controller's Dqlite port to join the database cluster due to improper TLS client certificate validation. With a CVSS score of 10.0 Critical, successful exploitation grants full read and write access to the underlying database, leading to total data compromise. While there is no evidence of active exploitation or public exploit code, the vulnerability has received some community attention.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 3.2.0, < 3.6.20CPE match | cpe:2.3:a:canonical:juju:*:*:*:*:*:*:*:* | ||
>= 4.0, < 4.0.4CPE match | cpe:2.3:a:canonical:juju:*:*:*:*:*:*:*:* | ||
>= 4.0, < 4.0.5CPE matchmatch criteria | cpe:2.3:a:canonical:juju:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.