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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | kubernetes-client | Affects 5.x versions, Fixed in kubernetes-client v5.0.3 and above. | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Ocp Tools 4 | jenkins | 2.387.3.1684911776-3.el8 | RHSA-2023:3299 |
| Red Hat Ocp Tools 4 | jenkins-2-plugins | 4.13.1684911916-1.el8 | RHSA-2023:3299 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
-
shoucheng3/fabric8io__kubernetes-client_CVE-2021-4178_5-0-2 ★ 0 · Aug 17, 2025
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | io.fabric8:kubernetes-client | >= 5.0.0-beta-1, < 5.0.3 | 5.0.3 | GHSA-98g7-rxmf-rrxm |
| Maven | io.fabric8:kubernetes-client | >= 5.1.0, < 5.1.2 | 5.1.2 | GHSA-98g7-rxmf-rrxm |
| Maven | io.fabric8:kubernetes-client | >= 5.2.0, < 5.3.2 | 5.3.2 | GHSA-98g7-rxmf-rrxm |
| Maven | io.fabric8:kubernetes-client | >= 5.5.0, < 5.7.4 | 5.7.4 | GHSA-98g7-rxmf-rrxm |
| Maven | io.fabric8:kubernetes-client | >= 5.8.0, < 5.8.1 | 5.8.1 | GHSA-98g7-rxmf-rrxm |
| Maven | io.fabric8:kubernetes-client | >= 5.9.0, < 5.10.2 | 5.10.2 | GHSA-98g7-rxmf-rrxm |
| Maven | io.fabric8:kubernetes-client | >= 5.11.0, < 5.11.2 | 5.11.2 | GHSA-98g7-rxmf-rrxm |
Advisories 2
- RHSA-2023:3299 Red Hat Security Advisory: jenkins and jenkins-2-plugins security update Red Hat Security Advisories (RHSA) · Oct 13, 2026
- WID-SEC-2022-0607 Red Hat FUSE: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 9, 2026