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CVE-2025-9708

MEDIUM
Published 2025-09-16T21:08:05.189Z
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CVSS Score

V3.1
6.8
/10
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Base Score Metrics
Exploitability: N/A Impact: N/A

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED

Impact Metrics

Confidentiality
HIGH
Integrity
HIGH
Availability
NONE

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.

Available Exploits

No exploits available for this CVE.

Related News

[kubernetes] CVE-2025-9708: Kubernetes C# Client: improper certificate validation in custom CA mode may lead to man-in-the-middle attacks

Posted by Rita Zhang on Sep 16Hello Kubernetes Community, 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 t…

Seclists.org 2025-09-16 16:11

Affected Products

EU Vulnerability Database

Monitored by ENISA for EU cybersecurity

EU Coordination

Not EU Coordinated

Exploitation Status

No Known Exploitation

ENISA Analysis

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

Affected Products (ENISA)

kubernetes
kubernetes csharp client

ENISA Scoring

CVSS Score (3.1)

6.8
/10
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

EPSS Score

0.020
probability

Data provided by ENISA EU Vulnerability Database. Last updated: September 17, 2025

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

✓ GitHub Reviewed MODERATE

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

GHSA-w7r3-mgwf-4mqq

Advisory Details

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

NuGet KubernetesClient
ECOSYSTEM: ≥0 <17.0.14

CVSS Scoring

CVSS Score

5.0

CVSS Vector

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

Advisory provided by GitHub Security Advisory Database. Published: September 17, 2025, Modified: September 17, 2025

Social Media Intelligence

Real-time discussions and threat intelligence from social platforms

1 post
Reddit 1 day, 13 hours ago
rwahowa

CVE-2025-9708: Kubernetes C# Client: improper certificate validation in custom CA mode may lead to man-in-the-middle attacks Source: Kubernetes community list Hello Kubernetes Community, 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 …

References

Published: 2025-09-16T21:08:05.189Z
Last Modified: 2025-09-17T13:42:59.781Z
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