Auth bypass in Argoproj Argo-Workflows
CVE-2026-28229
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.
Vulnerability class: Broken Access Control
EPSS: 0.007 (48.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Argoproj Argo-workflows — versions >= 4.0.0, < 4.0.2, < 3.7.11
- Argoproj Argo_workflows
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Frequently asked questions
- What is CVE-2026-28229?
- CVE-2026-28229 is a critical-severity vulnerability in Argoproj Argo-Workflows, classified under Incorrect Authorization. CVSS score: 9.8/10. Published 2026-03-11.
- How severe is CVE-2026-28229?
- Critical severity. CVSS v3 base score is 9.8 out of 10.