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CVE-2022-0759

Improper Certificate Validation in kubeclient

8.1 HighFix available

A flaw was found in all versions of kubeclient up to (but not including) v4.9.3, the Ruby client for Kubernetes REST API, in the way it parsed kubeconfig files. When the kubeconfig file does not configure custom CA to verify certs, kubeclient ends up accepting any certificate (it wrongly returns VERIFY_NONE). Ruby applications that leverage kubeclient to parse kubeconfig files are susceptible to Man-in-the-middle attacks (MITM).

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.94%Up 0.1 points since Mar 26, 2022
90%50%10%1%

What each source reports

NVD Score used 8.1

A flaw was found in all versions of kubeclient up to (but not including) v4.9.3, the Ruby client for Kubernetes REST API, in the way it parsed kubeconfig files. When the kubeconfig file does not configure custom CA to verify certs, kubeclient ends up accepting any certificate (it wrongly returns VERIFY_NONE). Ruby applications that leverage kubeclient to parse kubeconfig files are susceptible to Man-in-the-middle attacks (MITM).

Record
CVE-2022-0759
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
6.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness
CWE-295
Updated
2026-11-02
CVE List No score

A flaw was found in all versions of kubeclient up to (but not including) v4.9.3, the Ruby client for Kubernetes REST API, in the way it parsed kubeconfig files. When the kubeconfig file does not configure custom CA to verify certs, kubeclient ends up accepting any certificate (it wrongly returns VERIFY_NONE). Ruby applications that leverage kubeclient to parse kubeconfig files are susceptible to Man-in-the-middle attacks (MITM).

Record
CVE-2022-0759
Weakness
CWE-295
Updated
2026-11-02
EUVDEUVD-2022-1339 No score

A flaw was found in all versions of kubeclient up to (but not including) v4.9.3, the Ruby client for Kubernetes REST API, in the way it parsed kubeconfig files. When the kubeconfig file does not configure custom CA to verify certs, kubeclient ends up accepting any certificate (it wrongly returns VERIFY_NONE). Ruby applications that leverage kubeclient to parse kubeconfig files are susceptible to Man-in-the-middle attacks (MITM).

Record
EUVD-2022-1339
Updated
2026-11-03
GitHub AdvisoriesGHSA-69p3-xp37-f692 8.1

Improper Certificate Validation in kubeclient

A flaw was found in all versions of kubeclient up to (but not including) v4.9.3, the Ruby client for Kubernetes REST API, in the way it parsed kubeconfig files. When the kubeconfig file does not configure custom CA to verify certs, kubeclient ends up accepting any certificate (it wrongly returns VERIFY_NONE). Ruby applications that leverage kubeclient to parse kubeconfig files are susceptible to Man-in-the-middle attacks (MITM).

Record
GHSA-69p3-xp37-f692
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-295
Updated
2026-11-02
OSVDEBIAN-CVE-2022-0759 8.1

A flaw was found in all versions of kubeclient up to (but not including) v4.9.3, the Ruby client for Kubernetes REST API, in the way it parsed kubeconfig files. When the kubeconfig file does not configure custom CA to verify certs, kubeclient ends up accepting any certificate (it wrongly returns VERIFY_NONE). Ruby applications that leverage kubeclient to parse kubeconfig files are susceptible to Man-in-the-middle attacks (MITM).

Record
DEBIAN-CVE-2022-0759
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-03
OSVGHSA-69p3-xp37-f692 8.1

Improper Certificate Validation in kubeclient

A flaw was found in all versions of kubeclient up to (but not including) v4.9.3, the Ruby client for Kubernetes REST API, in the way it parsed kubeconfig files. When the kubeconfig file does not configure custom CA to verify certs, kubeclient ends up accepting any certificate (it wrongly returns VERIFY_NONE). Ruby applications that leverage kubeclient to parse kubeconfig files are susceptible to Man-in-the-middle attacks (MITM).

Record
GHSA-69p3-xp37-f692
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-295
Updated
2026-11-02
Show 4 moreShow less
OSVRHSA-2023:6818 9.8

Red Hat Security Advisory: Satellite 6.14 security and bug fix update

Record
RHSA-2023:6818
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2022-0759 8.1

A flaw was found in all versions of kubeclient up to (but not including) v4.9.3, the Ruby client for Kubernetes REST API, in the way it parsed kubeconfig files. When the kubeconfig file does not configure custom CA to verify certs, kubeclient ends up accepting any certificate (it wrongly returns VERIFY_NONE). Ruby applications that leverage kubeclient to parse kubeconfig files are susceptible to Man-in-the-middle attacks (MITM).

Record
UBUNTU-CVE-2022-0759
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSV No score

A flaw was found in all versions of kubeclient up to (but not including) v4.9.3, the Ruby client for Kubernetes REST API, in the way it parsed kubeconfig files. When the kubeconfig file does not configure custom CA to verify certs, kubeclient ends up accepting any certificate (it wrongly returns VERIFY_NONE). Ruby applications that leverage kubeclient to parse kubeconfig files are susceptible to Man-in-the-middle attacks (MITM).

Record
CVE-2022-0759
Weakness
CWE-295
Updated
2026-11-02
OSVRLSA-2023:6818 No score

Important: Satellite 6.14 security and bug fix update

Rocky Enterprise Software Foundation Satellite is a systems management tool for Linux-based infrastructure. It allows for provisioning, remote management, and monitoring of multiple Linux deployments with a single centralized tool.

Security Fix(es):

  • golang: net/http, x/net/http2: rapid stream resets can cause excessive work (CVE-2023-44487) (CVE-2023-39325)

  • HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack) (CVE-2023-44487)

  • GitPython: Insecure non-multi options in clone and clone_from is not blocked (CVE-2023-40267)

  • kubeclient: kubeconfig parsing error can lead to MITM attacks (CVE-2022-0759)

  • foreman: OS command injection via ct_command and fcct_command (CVE-2022-3874)

  • ruby-git: code injection vulnerability (CVE-2022-46648)

  • ruby-git: code injection vulnerability (CVE-2022-47318)

  • Foreman: Arbitrary code execution through templates (CVE-2023-0118)

  • rubygem-activerecord: SQL Injection (CVE-2023-22794)

  • openssl: c_rehash script allows command injection (CVE-2022-1292)

  • openssl: the c_rehash script allows command injection (CVE-2022-2068)

  • Pulp:Tokens stored in plaintext (CVE-2022-3644)

  • satellite: Blind SSRF via Referer header (CVE-2022-4130)

  • python-future: remote attackers can cause denial of service via crafted Set-Cookie header from malicious web server (CVE-2022-40899)

  • golang: net/http: excessive memory growth in a Go server accepting HTTP/2 requests (CVE-2022-41717)

  • rubygem-activerecord: Denial of Service (CVE-2022-44566)

  • rubygem-rack: denial of service in Content-Disposition parsing (CVE-2022-44570)

  • rubygem-rack: denial of service in Content-Disposition parsing (CVE-2022-44571)

  • rubygem-rack: denial of service in Content-Disposition parsing (CVE-2022-44572)

  • Foreman: Stored cross-site scripting in host tab (CVE-2023-0119)

  • puppet: Puppet Server ReDoS (CVE-2023-1894)

  • rubygem-actionpack: Denial of Service in Action Dispatch (CVE-2023-22792)

  • rubygem-actionpack: Denial of Service in Action Dispatch (CVE-2023-22795)

  • rubygem-activesupport: Regular Expression Denial of Service (CVE-2023-22796)

  • rubygem-globalid: ReDoS vulnerability (CVE-2023-22799)

  • rubygem-rack: Denial of service in Multipart MIME parsing (CVE-2023-27530)

  • rubygem-rack: denial of service in header parsing (CVE-2023-27539)

  • golang: net/http: insufficient sanitization of Host header (CVE-2023-29406)

  • sqlparse: Parser contains a regular expression that is vulnerable to ReDOS (Regular Expression Denial of Service) (CVE-2023-30608)

  • python-django: Potential bypass of validation when uploading multiple files using one form field (CVE-2023-31047)

  • python-requests: Unintended leak of Proxy-Authorization header (CVE-2023-32681)

  • python-django: Potential regular expression denial of service vulnerability in EmailValidator/URLValidator (CVE-2023-36053)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

This update also fixes several bugs and adds various enhancements. Documentation for these changes is available from the Release Notes document linked to in the References section.

Record
RLSA-2023:6818
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
kubeclient
RubyGems
before 4.9.3
4.9.3
ruby-kubeclient
Debian:12
before 4.9.3-1
4.9.3-1
ruby-kubeclient
Debian:13
before 4.9.3-1
4.9.3-1
ruby-kubeclient
Debian:14
before 4.9.3-1
4.9.3-1
kubeclient
RubyGems
before 4.9.3, plus listed versions
0.0.10.0.20.0.30.0.40.0.5
Show 45 moreShow less
0.0.60.0.70.0.80.0.90.1.00.1.10.1.100.1.110.1.120.1.130.1.140.1.150.1.160.1.170.1.20.1.30.1.40.1.50.1.60.1.70.1.80.1.90.2.00.3.00.4.00.5.00.5.10.6.00.7.00.8.00.8.10.9.01.0.01.1.01.1.11.1.21.1.31.1.41.2.02.0.02.1.02.2.02.3.02.4.02.5.1
4.9.3
rubygem-kubeclient
Red Hat:satellite:6.14::el8
before 0:4.10.1-1.el8sat
0:4.10.1-1.el8sat
puppet-agent
Red Hat:satellite_capsule:6.14::el8
before 0:7.26.0-3.el8sat
0:7.26.0-3.el8sat
puppet-agent
Red Hat:satellite:6.14::el8
before 0:7.26.0-3.el8sat
0:7.26.0-3.el8sat
python-pulp-ansible
Red Hat:satellite_capsule:6.14::el8
before 1:0.16.0-1.el8pc
1:0.16.0-1.el8pc
python39-pulp-ansible
Red Hat:satellite_capsule:6.14::el8
before 1:0.16.0-1.el8pc
1:0.16.0-1.el8pc
Show 57 moreShow less
Affected packages
PackageAffectedFixed
python-pulp-ansible
Red Hat:satellite:6.14::el8
before 1:0.16.0-1.el8pc
1:0.16.0-1.el8pc
python39-pulp-ansible
Red Hat:satellite:6.14::el8
before 1:0.16.0-1.el8pc
1:0.16.0-1.el8pc
foreman
Red Hat:satellite_capsule:6.14::el8
before 0:3.7.0.9-1.el8sat
0:3.7.0.9-1.el8sat
foreman-debug
Red Hat:satellite_capsule:6.14::el8
before 0:3.7.0.9-1.el8sat
0:3.7.0.9-1.el8sat
foreman
Red Hat:satellite_utils:6.14::el8
before 0:3.7.0.9-1.el8sat
0:3.7.0.9-1.el8sat
foreman-cli
Red Hat:satellite_utils:6.14::el8
before 0:3.7.0.9-1.el8sat
0:3.7.0.9-1.el8sat
foreman
Red Hat:satellite:6.14::el8
before 0:3.7.0.9-1.el8sat
0:3.7.0.9-1.el8sat
foreman-cli
Red Hat:satellite:6.14::el8
before 0:3.7.0.9-1.el8sat
0:3.7.0.9-1.el8sat
foreman-debug
Red Hat:satellite:6.14::el8
before 0:3.7.0.9-1.el8sat
0:3.7.0.9-1.el8sat
foreman-dynflow-sidekiq
Red Hat:satellite:6.14::el8
before 0:3.7.0.9-1.el8sat
0:3.7.0.9-1.el8sat
foreman-ec2
Red Hat:satellite:6.14::el8
before 0:3.7.0.9-1.el8sat
0:3.7.0.9-1.el8sat
foreman-journald
Red Hat:satellite:6.14::el8
before 0:3.7.0.9-1.el8sat
0:3.7.0.9-1.el8sat
foreman-libvirt
Red Hat:satellite:6.14::el8
before 0:3.7.0.9-1.el8sat
0:3.7.0.9-1.el8sat
foreman-openstack
Red Hat:satellite:6.14::el8
before 0:3.7.0.9-1.el8sat
0:3.7.0.9-1.el8sat
foreman-ovirt
Red Hat:satellite:6.14::el8
before 0:3.7.0.9-1.el8sat
0:3.7.0.9-1.el8sat
foreman-postgresql
Red Hat:satellite:6.14::el8
before 0:3.7.0.9-1.el8sat
0:3.7.0.9-1.el8sat
foreman-redis
Red Hat:satellite:6.14::el8
before 0:3.7.0.9-1.el8sat
0:3.7.0.9-1.el8sat
foreman-service
Red Hat:satellite:6.14::el8
before 0:3.7.0.9-1.el8sat
0:3.7.0.9-1.el8sat
foreman-telemetry
Red Hat:satellite:6.14::el8
before 0:3.7.0.9-1.el8sat
0:3.7.0.9-1.el8sat
foreman-vmware
Red Hat:satellite:6.14::el8
before 0:3.7.0.9-1.el8sat
0:3.7.0.9-1.el8sat
python-future
Red Hat:satellite_capsule:6.14::el8
before 0:0.18.3-1.el8pc
0:0.18.3-1.el8pc
python39-future
Red Hat:satellite_capsule:6.14::el8
before 0:0.18.3-1.el8pc
0:0.18.3-1.el8pc
python-future
Red Hat:satellite:6.14::el8
before 0:0.18.3-1.el8pc
0:0.18.3-1.el8pc
python39-future
Red Hat:satellite:6.14::el8
before 0:0.18.3-1.el8pc
0:0.18.3-1.el8pc
yggdrasil-worker-forwarder
Red Hat:satellite:6.14::el8
before 0:0.0.3-1.el8sat
0:0.0.3-1.el8sat
rubygem-activerecord
Red Hat:satellite:6.14::el8
before 0:6.1.7.3-1.el8sat
0:6.1.7.3-1.el8sat
rubygem-rack
Red Hat:satellite_capsule:6.14::el8
before 0:2.2.7-1.el8sat
0:2.2.7-1.el8sat
rubygem-rack
Red Hat:satellite:6.14::el8
before 0:2.2.7-1.el8sat
0:2.2.7-1.el8sat
rubygem-git
Red Hat:satellite:6.14::el8
before 0:1.18.0-1.el8sat
0:1.18.0-1.el8sat
puppetserver
Red Hat:satellite_capsule:6.14::el8
before 0:7.11.0-1.el8sat
0:7.11.0-1.el8sat
puppetserver
Red Hat:satellite:6.14::el8
before 0:7.11.0-1.el8sat
0:7.11.0-1.el8sat
rubygem-actionpack
Red Hat:satellite:6.14::el8
before 0:6.1.7.3-1.el8sat
0:6.1.7.3-1.el8sat
rubygem-activesupport
Red Hat:satellite:6.14::el8
before 0:6.1.7.3-1.el8sat
0:6.1.7.3-1.el8sat
rubygem-globalid
Red Hat:satellite:6.14::el8
before 0:1.1.0-1.el8sat
0:1.1.0-1.el8sat
python-sqlparse
Red Hat:satellite_capsule:6.14::el8
before 0:0.4.4-1.el8pc
0:0.4.4-1.el8pc
python39-sqlparse
Red Hat:satellite_capsule:6.14::el8
before 0:0.4.4-1.el8pc
0:0.4.4-1.el8pc
python-sqlparse
Red Hat:satellite:6.14::el8
before 0:0.4.4-1.el8pc
0:0.4.4-1.el8pc
python39-sqlparse
Red Hat:satellite:6.14::el8
before 0:0.4.4-1.el8pc
0:0.4.4-1.el8pc
python-django
Red Hat:satellite_capsule:6.14::el8
before 0:3.2.21-1.el8pc
0:3.2.21-1.el8pc
python39-django
Red Hat:satellite_capsule:6.14::el8
before 0:3.2.21-1.el8pc
0:3.2.21-1.el8pc
python-django
Red Hat:satellite:6.14::el8
before 0:3.2.21-1.el8pc
0:3.2.21-1.el8pc
python39-django
Red Hat:satellite:6.14::el8
before 0:3.2.21-1.el8pc
0:3.2.21-1.el8pc
python-requests
Red Hat:satellite_capsule:6.14::el8
before 0:2.31.0-1.el8pc
0:2.31.0-1.el8pc
python39-requests
Red Hat:satellite_capsule:6.14::el8
before 0:2.31.0-1.el8pc
0:2.31.0-1.el8pc
python-requests
Red Hat:satellite:6.14::el8
before 0:2.31.0-1.el8pc
0:2.31.0-1.el8pc
python39-requests
Red Hat:satellite:6.14::el8
before 0:2.31.0-1.el8pc
0:2.31.0-1.el8pc
python-gitpython
Red Hat:satellite_capsule:6.14::el8
before 0:3.1.32-1.el8pc
0:3.1.32-1.el8pc
python39-gitpython
Red Hat:satellite_capsule:6.14::el8
before 0:3.1.32-1.el8pc
0:3.1.32-1.el8pc
python-gitpython
Red Hat:satellite:6.14::el8
before 0:3.1.32-1.el8pc
0:3.1.32-1.el8pc
python39-gitpython
Red Hat:satellite:6.14::el8
before 0:3.1.32-1.el8pc
0:3.1.32-1.el8pc
ruby-kubeclient
Ubuntu:18.04:LTS
All versions, plus listed versions
2.3.0-23.0.0-1
None known
ruby-kubeclient
Ubuntu:20.04:LTS
All versions, plus listed versions
4.3.0-14.5.0-14.6.0-1
None known
ruby-kubeclient
Ubuntu:22.04:LTS
All versions, plus listed versions
4.9.1-24.9.2-14.9.2-2
None known
ruby-kubeclient
Ubuntu:24.04:LTS
All versions, plus listed versions
4.11.0-2
None known
ruby-kubeclient
Ubuntu:25.10
All versions, plus listed versions
4.12.0-1
None known
ruby-kubeclient
Ubuntu:26.10
All versions, plus listed versions
4.13.0-14.13.0-4
None known
ruby-kubeclient
Ubuntu:26.04:LTS
All versions, plus listed versions
4.12.0-14.13.0-1
None known

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2022-0759 is a high vulnerability (CVSS 8.1) in Redhat Kubeclient, published March 25, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.94%, the 61st percentile. Fixed in kubeclient 4.9.3.

References

Show 194 moreShow less
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Left out here: 21 versions and 233 references. The JSON record has them.

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