Sensitive Data Exposure in Argo Workflows by Argoproj
CVE-2026-28229

9.8CRITICAL

Key Information:

Vendor

Argoproj

Status
Argo-workflows
Vendor
CVE Published:
11 March 2026

What is CVE-2026-28229?

Argo Workflows, an open-source workflow engine for Kubernetes, contains a vulnerability that allows unauthorized access to workflow templates and potentially sensitive data. Prior to versions 4.0.2 and 3.7.11, any client with a Bearer token, even an empty one, could retrieve WorkflowTemplates and ClusterWorkflowTemplates. This exposure may disclose critical information such as embedded secrets. Users are advised to upgrade to the latest versions to mitigate this risk.

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Deploy the Patch

Affected Version(s)

argo-workflows >= 4.0.0, < 4.0.2 < 4.0.0, 4.0.2

argo-workflows < 3.7.11 < 3.7.11

References

https://github.com/argoproj/argo-workflows/security/advis...
x_refsource_CONFIRM

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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