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CVE-2025-9708 — Vulnerability in KubernetesClient — CVE Details

MEDIUM

Kubernetes C# client accepts certificates from any CA without properly verifying the trust chain

Published September 17, 2025Updated September 10, 2026Source: osv

Summary

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.

Advisory Timeline

  • First published September 17, 2025 (390 days ago).
  • Last revised September 10, 2026 — 358 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

NuGet
Update KubernetesClient to 17.0.14 or later
dotnet add package KubernetesClient --version 17.0.14

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: nuget (1).

PackageEcosystemAffectedFixed In
KubernetesClient
nuget
0.1.0-beta, 0.2.0-beta, 0.3.0-beta, 0.4.0-beta (+280 more)17.0.14

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-295
    Improper Certificate ValidationMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 6.8 score means for each attack dimension.

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

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

References

Frequently Asked Questions

What is CVE-2025-9708?
Kubernetes C# client accepts certificates from any CA without properly verifying the trust chain This vulnerability has been assigned a severity rating of MEDIUM (CVSS score: 6.8/10).
How do I check if my project is affected by CVE-2025-9708?
CVE-2025-9708 affects KubernetesClient. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2025-9708 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
6.8

Exploitation requires specific conditions or has limited impact. Remediate within weeks.

Also Known As

GHSA-w7r3-mgwf-4mqq

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