CVE-2026-4370— Improper TLS Client/Server authentication and certificate verification on Database Cluster
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I. Basic Information for CVE-2026-4370
Vulnerability Information
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Vulnerability Title
Improper TLS Client/Server authentication and certificate verification on Database Cluster
Source: NVD (National Vulnerability Database)
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
证书验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Juju 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Juju是Canonical Juju开源的一个开源应用程序编排引擎。 Juju 3.2.0至3.6.19版本和4.0至4.0.4版本存在安全漏洞，该漏洞源于内部Dqlite数据库集群未能执行正确的TLS客户端和服务器身份验证，可能导致未经身份验证的攻击者加入数据库集群并获取对底层数据库的完全读写访问权限。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
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Affected Products
II. Public POCs for CVE-2026-4370
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IV. Related Vulnerabilities
Same product: Juju
- CVE-2026-5412
Juju CloudSpec API could leak senstive information - CVE-2026-5774
Juju API Server Denial of Service and Authentication Replay - CVE-2025-68153
Juju: Resource poisoning - CVE-2025-68152
Juju: Read All Controller Logs From Compromised Workload - CVE-2026-32694
Insecure Direct Object Reference attack via predictable secr
Same vendor: Canonical
- CVE-2026-6970
authd Denial of Service and Local Privilege Escalation - CVE-2026-6369
Exposed Session Token in canonical-livepatch client snap - CVE-2026-5412
Juju CloudSpec API could leak senstive information - CVE-2026-5774
Juju API Server Denial of Service and Authentication Replay - CVE-2025-14551
Senstive information disclosure was affecting subiquity
Same weakness: CWE-295
V. Comments for CVE-2026-4370
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