CVE-2025-9708
mediumpriority · track · 0EPSS 0.003 · 22 %ileEURUUSEPSS · scored 2026-10-22
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
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affected products (3)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- GHSA-w7r3-mgwf-4mqqKubernetes C# client accepts certificates from any CA without properly verifying the trust chain2025-09-17ghsa · osvUS
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.
also known as (4)
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sources
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references (8)
External citations — patches, advisories, analysis.
- https://github.com/kubernetes/kubernetes/issues/134063cnnvd
- https://github.com/kubernetes/kubernetes/releasesPatchcnnvd
- https://groups.google.com/g/kubernetes-security-announce/c/rLopt2Msvbw/m/rK6XeNw2CgAJcnnvd
- https://github.com/kubernetes/kubernetes/issues/134063enisa_euvd
- https://groups.google.com/g/kubernetes-security-announce/c/rLopt2Msvbw/m/rK6XeNw2CgAJenisa_euvd
- http://www.openwall.com/lists/oss-security/2025/09/16/1nvd
- https://github.com/kubernetes/kubernetes/issues/134063nvd
- https://groups.google.com/g/kubernetes-security-announce/c/rLopt2Msvbw/m/rK6XeNw2CgAJnvd
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