CVE-2025-9708
September 16, 2025
A vulnerability exists in the Kubernetes C# client where the certificate validation logic accepts properly constructed certificates from any Certificate Authority (CA) without properly verifying the trust chain. This flaw allows a malicious actor to present a forged certificate and potentially intercept or manipulate communication with the Kubernetes API server, leading to possible man-in-the-middle attacks and API impersonation.
Affected Packages
KubernetesClient (DOT_NET):
Affected version(s) >=0.1.0.0 <17.0.14Fix Suggestion:
Update to version 17.0.14https://github.com/kubernetes-client/csharp.git (GITHUB):
Affected version(s) >=v7.1.9 <v17.0.14Fix Suggestion:
Update to version v17.0.14KubernetesClient (NUGET):
Affected version(s) >=0.1.0-beta <17.0.14Fix Suggestion:
Update to version 17.0.14Related Resources (2)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.6
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.8
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improper Certificate Validation
EPSS
Base Score:
0.02
