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Medium, CVSS 6.7

fabric8 kubernetes-client vulnerable

CVE-2021-4178GHSA-98g7-rxmf-rrxm

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (io.fabric8:kubernetes-client 5.11.2, 5.10.2, 5.8.1, 5.7.4, 5.3.2, 5.1.2, 5.0.3), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • Maven io.fabric8:kubernetes-client

    Affected
    >= 5.0.0-beta-1, < 5.0.3>= 5.1.0, < 5.1.2>= 5.2.0, < 5.3.2>= 5.5.0, < 5.7.4>= 5.8.0, < 5.8.1>= 5.9.0, < 5.10.2>= 5.11.0, < 5.11.2
    Fixed in
    5.3.2, 5.11.2, 5.10.2, 5.7.4, 5.0.3, 5.1.2, 5.8.1

Sources

  • GitHub Advisory Database and maintainer security advisories on GitHub

    GitHub-reviewed advisory GHSA-98g7-rxmf-rrxm lists affected ranges: Maven io.fabric8:kubernetes-client >=5.0.0-beta-1 =5.1.0 =5.2.0 =5.5.0 =5.8.0 =5.9.0 =5.11.0 <5.11.2

    VerifiedObserved Structured GitHub Advisory Database record (type=reviewed) from the GitHub REST API.

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
6.7 · CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS
  • CVE-2021-4178: 0.34% estimated exploitation activity in the next 30 days; percentile 27.00 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

fabric8 Kubernetes client had an arbitrary code execution flaw in versions 5.0.0-beta-1 and higher. Attackers could potentially insert malicious YAMLs due to misconfigured YAML parsing.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-98g7-rxmf-rrxm

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2021-4178

Advisory: fabric8 kubernetes-client vulnerable
IDs: CVE-2021-4178, GHSA-98g7-rxmf-rrxm
Record: https://patchnext.com/advisories/cve-2021-4178 (revision 1, source checked 26 Oct 2026, 16:11 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.7)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: io.fabric8:kubernetes-client 5.11.2, 5.10.2, 5.8.1, 5.7.4, 5.3.2, 5.1.2, 5.0.3. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven io.fabric8:kubernetes-client: affected >= 5.0.0-beta-1, < 5.0.3; >= 5.1.0, < 5.1.2; >= 5.2.0, < 5.3.2; >= 5.5.0, < 5.7.4; >= 5.8.0, < 5.8.1; >= 5.9.0, < 5.10.2; >= 5.11.0, < 5.11.2; fixed in 5.3.2, 5.11.2, 5.10.2, 5.7.4, 5.0.3, 5.1.2, 5.8.1

## Suggested inspection (read-only)
- Maven io.fabric8:kubernetes-client: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on io.fabric8:kubernetes-client.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-98g7-rxmf-rrxm (GitHub-reviewed advisory GHSA-98g7-rxmf-rrxm lists affected ranges: Maven io.fabric8:kubernetes-client >=5.0.0-beta-1 =5.1.0 =5.2.0 =5.5.0 =5.8.0 =5.9.0 =5.11.0 <5.11.2)

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