CVE-2025-9708 - CVE House
Back to Database
Status published Medium CVE-2025-9708

Kubernetes C# Client: improper certificate validation in custom CA mode may lead to man-in-the-middle attacks

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2025-9708

Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • elliott-beach

References

More from Kubernetes

View All →
CVE-2025-7445
Kubernetes secrets-store-sync-controller discloses service account tokens in logs
Medium 6.5
CVE-2025-7342
VM images built with Kubernetes Image Builder Nutanix or OVA providers use default credentials for Windows images if user did not override
High 7.5
CVE-2025-5187
Nodes can delete themselves by adding an OwnerReference
Medium 6.7
CVE-2025-4563
Nodes can bypass dynamic resource allocation authorization checks
Low 2.7
CVE-2025-1767
This CVE only affects Kubernetes clusters that utilize the in-tree...
Medium 6.5

Affected Vendor

Affected Software

Kubernetes CSharp Client
Vulnerable Versions:
0, 17.0.14

Timeline

Official Publish: September 16th, 2025
Last Modified: November 4th, 2025
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Weaknesses (CWE)

CWE-295

MITRE ATT&CK TTPs

T1557 Adversary-in-the-Middle
Credential Access
T1040 Network Sniffing
Collection
T1552 Unsecured Credentials
Credential Access
T1071 Application Layer Protocol
Command and Control
T1565 Data Manipulation
Impact