argoproj argo-workflows up to 3.7.13/4.0.4 authorization

Summaryinfo

A vulnerability described as critical has been identified in argoproj argo-workflows up to 3.7.13/4.0.4. Affected by this issue is some unknown functionality. Executing a manipulation can lead to authorization. The identification of this vulnerability is CVE-2026-42296. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in argoproj argo-workflows up to 3.7.13/4.0.4. It has been declared as critical. This vulnerability affects an unknown code block. The manipulation with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-863. The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability was named CVE-2026-42296 since 04/26/2026. The exploitation appears to be easy. The attack can be initiated remotely. The technical details are unknown and an exploit is not available.

Upgrading to version 3.7.14 or 4.0.5 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 534f4ff1cbd86908e8ff76d97d553ad5a49a950d is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• argoproj

Name

• argo-workflows

Version

• 3.7.0
• 3.7.1
• 3.7.2
• 3.7.3
• 3.7.4
• 3.7.5
• 3.7.6
• 3.7.7
• 3.7.8
• 3.7.9
• 3.7.10
• 3.7.11
• 3.7.12
• 3.7.13
• 4.0.0
• 4.0.1
• 4.0.2
• 4.0.3
• 4.0.4

License

• open-source

Website

• Product: https://github.com/argoproj/argo-workflows/

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