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No exploitation reportedFix available

CVE-2022-0759

No exploitation reported by the sources we read.

  • Published2022-03-25
  • Fixed in4.9.3
  • WeaknessCWE-295

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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).

Timeline

dates in UTC
  1. 2022-03-2519:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2022-0759?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-0759?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV
Redhat kubeclient
BranchAffectedFixed in
4.9< 4.9.34.9.3

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • RHSA-2023:6818 Red Hat Product Security2 products fixed

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

  • RHSA-2022:6051 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: Logging Subsystem 5.5.0 - Red Hat OpenShift security update

  • RHSA-2022:2217 Red Hat Product Security3 products fixed

    Red Hat Security Advisory: Red Hat OpenShift Logging Security and Bug update Release 5.3.7

  • RHSA-2022:2218 Red Hat Product Security3 products fixed

    Red Hat Security Advisory: Openshift Logging Security and Bug update Release (5.2.10)

  • RHSA-2022:1461 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: Logging Subsystem 5.4 - Red Hat OpenShift Security and Bug update

Full record on NVD

Fix

  1. Update Redhat kubeclient to 4.9.3
  2. Vendor fix Red Hat Product Security RHSA-2023:6818 · 2 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For detailed instructions how to apply this update, refer to: https://access.redhat.com/documentation/en-us/red_hat_satellite/6.14/html/upgrading_red_hat_satellite_to_6.14/index
  3. Vendor fix Red Hat Product Security RHSA-2022:6051 · 4 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  4. Vendor fix Red Hat Product Security RHSA-2022:2217 · 3 productsFor OpenShift Container Platform 4.10 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this errata update: https://docs.openshift.com/container-platform/4.10/release_notes/ocp-4-10-release-not…
  5. Vendor fix Red Hat Product Security RHSA-2022:2218 · 3 productsFor OpenShift Container Platform 4.8 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this errata update: https://docs.openshift.com/container-platform/4.8/release_notes/ocp-4-8-release-notes.…

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVSS 3.18.1read 2026-10-23
  • NVDCVSS 2.06.8read 2026-10-23
  • CNAweakness (CWE)CWE-295read 2026-10-23
  • NVDweakness (CWE)CWE-295read 2026-10-23
  • FIRST EPSSEPSS score0.9 %2026-10-23
  • OSVaffected packages—

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2022-03-25
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2022-0759?

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).

Is CVE-2022-0759 actively exploited?

Active exploitation of CVE-2022-0759 has not been confirmed. Its EPSS score was 0.9% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-0759?

CVE-2022-0759 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

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