Improper Certificate Validation Affecting kubernetesclient package, versions [,17.0.14)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DOTNET-KUBERNETESCLIENT-12818381
- published18 Sept 2025
- disclosed16 Sept 2025
- creditElliott Beach
Introduced: 16 Sep 2025
NewCVE-2025-9708 (opens in a new tab)How to fix?
Upgrade KubernetesClient to version 17.0.14 or higher.
Overview
Affected versions of this package are vulnerable to Improper Certificate Validation via a flaw in the certificate validation logic, which accepts properly constructed certificates from any Certificate Authority (CA) without properly verifying the trust chain. An attacker can use this to intercept or manipulate communications, leading to man-in-the-middle attacks and API impersonation.
Workaround
Mitigate the risk by moving the custom CA certificates into the system's trust store, rather than keeping them in the kubeconfig file. This forces the system to perform proper trust chain validation. Alternatively, consider disabling certificate-based authentication temporarily, if feasible.