CVE-2022-0759Network attack vector

Kubernetes API interception via VERIFY_NONE default

Published Mar 25, 2022 · Updated Aug 2, 2024

Improper certificate validation in Kubeclient before 4.9.3 allows remote attackers to intercept Kubernetes API connections via man-in-the-middle attacks. Kubeclient::Config sets ssl_options[:verify_ssl] to VERIFY_NONE when kubeconfig lacks a custom CA, so TLS certificates are not checked against the system trust store. The attack requires a network position between the Ruby application and Kubernetes API; intercepted credentials and responses can enable actions available to the application.

CVSS severity8.1
High
EPSS probability0.94%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper certificate validation in Kubeclient before 4.9.3 allows remote attackers to intercept Kubernetes API connections via man-in-the-middle attacks. Kubeclient::Config sets ssl_options[:verify_ssl] to VERIFY_NONE when kubeconfig lacks a custom CA, so TLS certificates are not checked against the system trust store. The attack requires a network position between the Ruby application and Kubernetes API; intercepted credentials and responses can enable actions available to the application.

The record

CVE
CVE-2022-0759
Published
Mar 25, 2022
Updated
Aug 2, 2024
Vendor
ManageIQ
Product
Kubeclient
Classifications
CWE-295, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 25, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.9.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ManageIQ · Kubeclientversion=4.9.3

Published CVSS scores

6.8NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
8.1NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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