Improper TLS Client/Server authentication and certificate verification on Database Cluster

MITRE NVD CVE.ORG Print: PDF PDF

Summary

CVECVE-2026-4370
StatePUBLISHED
Assignercanonical
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-01 09:16:17 UTC
Updated2026-04-01 14:23:37 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v3.1 10 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS: 0.000350000 probability, percentile 0.101180000 (date 2026-04-01)

Problem Types: CWE-295 | CWE-306 | CWE-295 CWE-295 Improper certificate validation | CWE-306 CWE-306 Missing authentication for critical function

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary10CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
3.1CNACVSS10CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Canonical Juju affected 3.2.0 3.6.20 semver Linux
CNA Canonical Juju affected 4.0 4.0.4 semver Linux

References

ReferenceSourceLinkTags
github.com/juju/juju/security/advisories/GHSA-gvrj-cjch-728p [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Harry Pidcock (en)

CNA: Joseph Phillips (en)

CNA: Ian Booth (en)

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