CVE-2021-4178

Name: CVE-2021-4178
Creator: NVD / NIST
Published: 2022-08-24T16:15:09.77+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.7/10EPSS 0.31%

Last modified Jun 17, 2026

CVE-2021-4178 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. A arbitrary code execution flaw was found in the Fabric 8 Kubernetes client affecting versions 5.0.0-beta-1 and above. Due to an improperly configured YAML parsing, this will allow a local and privileged attacker to supply malicious YAML.. EPSS estimates a 0.31% chance of exploitation in the next 30 days.

Description

A arbitrary code execution flaw was found in the Fabric 8 Kubernetes client affecting versions 5.0.0-beta-1 and above. Due to an improperly configured YAML parsing, this will allow a local and privileged attacker to supply malicious YAML.

Metrics

CVSS 3.1

6.7/10

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.31%

22.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Redhat	Fabric8-Kubernetes	>= 5.0.1, < 5.0.3	—
Redhat	Fabric8-Kubernetes	>= 5.1.0, < 5.1.2	—
Redhat	Fabric8-Kubernetes	>= 5.2.0, < 5.3.2	—
Redhat	Fabric8-Kubernetes	>= 5.5.0, < 5.7.4	—
Redhat	Fabric8-Kubernetes	>= 5.9.0, < 5.10.2	—
Redhat	Fabric8-Kubernetes	>= 5.11.0, < 5.11.2	—
Redhat	Fabric8-Kubernetes	5.0.0	Beta1
Redhat	Fabric8-Kubernetes	5.8.0	—
Redhat	A-Mq Streams	2.0.1	—
Redhat	Build Of Quarkus	2.2.5	—
Redhat	Descision Manager	7.0	—
Redhat	Fuse	7.11	—
Redhat	Integration Camel K	All versions	—
Redhat	Integration Camel Quarkus	2.2.1	—
Redhat	Openshift Application Runtimes	All versions	—
Redhat	Process Automation	7.0	—

References

https://access.redhat.com/security/cve/CVE-2021-4178Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2034388Issue Tracking, Vendor Advisory
https://github.com/advisories/GHSA-98g7-rxmf-rrxmThird Party Advisory
https://github.com/fabric8io/kubernetes-client/issues/3653Issue Tracking, Third Party Advisory
https://access.redhat.com/security/cve/CVE-2021-4178Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2034388Issue Tracking, Vendor Advisory
https://github.com/advisories/GHSA-98g7-rxmf-rrxmThird Party Advisory
https://github.com/fabric8io/kubernetes-client/issues/3653Issue Tracking, Third Party Advisory

Timeline

Published: Aug 24, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-4178?

How severe is CVE-2021-4178?

CVE-2021-4178 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.31% probability of exploitation in the next 30 days.

How do I fix CVE-2021-4178?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-4178?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST