CVE Tools
Sign in

CVE-2025-9708

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

Published: Sep 16, 2025Updated: Nov 4, 2025 Sources: CVE List NVD GHSA BDUCWE-295
6.8MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 79.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:RS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-295

Affected Products

Kubernetes
oss-project·USaka k8s
Kubernetes CSharp ClientOn-premLibrary
Cloud & SaaS / container-orchestration
Google Inc
commercial·USaka google
KubernetesOn-premDev Tool
Cloud & SaaS / container-orchestration
NuGet
package-ecosystem
KubernetesClient
OSS Libraries

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://groups.google.com/g/kubernetes-security-announce/c/rLopt2Msvbw/m/rK6XeNw2CgAJ
groups.google.com
https://github.com/kubernetes/kubernetes/issues/134063
github.com
http://www.openwall.com/lists/oss-security/2025/09/16/1
openwall.com
and 2 more references View all →

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2025-9708 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows