medium6.8
CVE-2025-9708
Kubernetes C# client accepts certificates from any CA without properly verifying the trust chain
Impact
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
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| nuget | KubernetesClient | < 17.0.14 | 17.0.14 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/kubernetes/kubernetes/issues/134063
- https://groups.google.com/g/kubernetes-security-announce/c/rLopt2Msvbw/m/rK6XeNw2CgAJ
- http://www.openwall.com/lists/oss-security/2025/09/16/1
- https://github.com/advisories/GHSA-w7r3-mgwf-4mqq
- https://nvd.nist.gov/vuln/detail/CVE-2025-9708