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CVE-2026-28229— Argo Workflows has unauthorized access to Argo Workflows Template

Quick assessment

Affected
argoproj argo-workflows
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Argo Workflows是Argo项目的一个用于 Kubernetes 的开源容器原生工作流引擎。 Argo Workflows 4.0.2之前版本和3.7.11之前版本存在安全漏洞，该漏洞源于工作流模板端点允许任何客户端检索WorkflowTemplates，可能导致泄露包含嵌入式Secret清单的敏感模板内容。

CVSS 9.8 · Critical EPSS 0.81% · P56

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 2

VendorProduct Version RangeStatus
argoproj argo-workflows >= 4.0.0, < 4.0.2 affected
< 3.7.11 affected
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I. Basic Information for CVE-2026-28229

Vulnerability Information
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Vulnerability Title
Argo Workflows has unauthorized access to Argo Workflows Template
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Argo Workflows 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Argo Workflows是Argo项目的一个用于 Kubernetes 的开源容器原生工作流引擎。 Argo Workflows 4.0.2之前版本和3.7.11之前版本存在安全漏洞，该漏洞源于工作流模板端点允许任何客户端检索WorkflowTemplates，可能导致泄露包含嵌入式Secret清单的敏感模板内容。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
argoproj argo-workflows >= 4.0.0, < 4.0.2 -

II. Public POCs for CVE-2026-28229

# POC Description Source Link Shenlong Link
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Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
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claude_code · 8151 chars
GitHub 复现环境（可 clone 直接跑）
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III. Intelligence Information for CVE-2026-28229

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IV. Related Vulnerabilities

Same product: argo-workflows
Same vendor: argoproj
Same weakness: CWE-863

V. Comments for CVE-2026-28229

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