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CVE-2026-42296

8.1 · HIGH

Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes.

Published May 9, 2026CWE-863EPSS 0.49%

Overview

CVE-2026-42296 is a high-severity vulnerability. It was published on May 9, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. Prior to versions 3.7.14 and 4.0.5, a user with create Workflow permission can bypass templateReferencing: Strict to get host network access, switch service accounts, override pod security context, add tolerations to schedule on control-plane nodes, or enable SA token mounting. This defeats the stated purpose of the feature. The practical impact depends on what Kubernetes-level controls are in place. Clusters with PodSecurity admission or OPA/Gatekeeper would independently block some of these (like hostNetwork). Clusters that rely on Argo's Strict mode as the primary enforcement layer are fully exposed. This issue has been patched in versions 3.7.14 and 4.0.5.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/argoproj/argo-workflows/commit/534f4ff1cbd86908e8ff76d97d553ad5a49a950dGitHubgithub.com/argoproj/argo-workflows/releases/tag/v3.7.14GitHubgithub.com/argoproj/argo-workflows/releases/tag/v4.0.5GitHubgithub.com/argoproj/argo-workflows/security/advisories/GHSA-3775-99mw-8rp4Refaccess.redhat.com/security/cve/CVE-2026-42296Refbugzilla.redhat.com/show_bug.cgi?id=2468446GitHubgithub.com/argoproj/argo-workflows/security/advisories/GHSA-3775-99mw-8rp4Refsecurity.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42296.json

How CyberStrike helps

Frequently asked questions

What is CVE-2026-42296?

CVE-2026-42296 is a high-severity vulnerability. It was published on May 9, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-42296?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-42296?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-42296?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-42296 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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