CVE-2026-28229

Argo Workflows has unauthorized access to Argo Workflows Template

Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. Prior to 4.0.2 and 3.7.11, Workflow templates endpoints allow any client to retrieve WorkflowTemplates (and ClusterWorkflowTemplates). Any request with a Authorization: Bearer nothing token can leak sensitive template content, including embedded Secret manifests. This vulnerability is fixed in 4.0.2 and 3.7.11.

Affected

argoproj · argo-workflows

CVSS v3.1 NVD

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 GITHUB

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.81% chance of exploitation in the next 30 days, 56th percentile

Published

2026-03-11

Updated

2026-07-15

Proof-of-concept exploits (1)

• advisories/GHSA-56px-hm34-xqj5

Security advisories

• argoproj/argo-workflows/security/advisories/GHSA-56px-hm34-xqj5

References

• CVE Record
• NVD entry