What’s Vulnerable › Vulnerabilities

CVE-2021-4178

• Severity: medium (CVSS 6.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-08-24 · updated 2026-06-17
• Weakness: CWE-502

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.

Affected products

• RedHat A-Mq Streams: 2.0.1
• Red Hat build of Quarkus: 2.2.5
• RedHat Descision Manager: 7.0
• RedHat Fabric8-Kubernetes: from 5.0.1 before 5.0.3; from 5.1.0 before 5.1.2; from 5.2.0 before 5.3.2; from 5.5.0 before 5.7.4; from 5.9.0 before 5.10.2; from 5.11.0 before 5.11.2 — fixed in 5.0.3, 5.1.2, 5.10.2, 5.11.2, 5.3.2, 5.7.4
• Red Hat 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

How to fix

Upgrade to a fixed version: RedHat Fabric8-Kubernetes 5.0.3, 5.1.2, 5.10.2, 5.11.2. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/security/cve/CVE-2021-4178
• https://bugzilla.redhat.com/show_bug.cgi?id=2034388
• https://github.com/advisories/GHSA-98g7-rxmf-rrxm
• https://github.com/fabric8io/kubernetes-client/issues/3653
• https://access.redhat.com/security/cve/CVE-2021-4178
• https://bugzilla.redhat.com/show_bug.cgi?id=2034388
• https://github.com/advisories/GHSA-98g7-rxmf-rrxm
• https://github.com/fabric8io/kubernetes-client/issues/3653

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