CVE-2025-9708CWE-295

Kubernetes C# Client: improper certificate validation in custom CA mode may lead to man-in-the-middle attacks

Medium · published September 16, 2025

CVSS v3.1
6.8
EPSS
0%
Percentile
22.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00309 · 22.5th percentile
Weakness
CWE-295 · Improper Certificate Validation
Published
2025-09-16T21:08Z
EPSS history
Timeline
  • 16 SEP 21:08Z
    Kubernetes C# Client: improper certificate validation in custom CA mode may lead to man-in-the-middle attacks
    cvelistv5