CVE-2026-31892— WorkflowTemplate Security Bypass via podSpecPatch in Strict/Secure Reference Mode
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I. Basic Information for CVE-2026-31892
Vulnerability Information
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Vulnerability Title
WorkflowTemplate Security Bypass via podSpecPatch in Strict/Secure Reference Mode
Source: NVD (National Vulnerability Database)
Vulnerability Description
Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. From 2.9.0 to before 4.0.2 and 3.7.11, A user who can submit Workflows can completely bypass all security settings defined in a WorkflowTemplate by including a podSpecPatch field in their Workflow submission. This works even when the controller is configured with templateReferencing: Strict, which is specifically documented as a mechanism to restrict users to admin-approved templates. The podSpecPatch field on a submitted Workflow takes precedence over the referenced WorkflowTemplate during spec merging and is applied directly to the pod spec at creation time with no security validation. This vulnerability is fixed in 4.0.2 and 3.7.11.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制不正确
Source: NVD (National Vulnerability Database)
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，该漏洞源于用户可通过podSpecPatch字段绕过WorkflowTemplate中的所有安全设置。
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)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| argoproj | argo-workflows | >= 4.0.0, < 4.0.2 | - |
II. Public POCs for CVE-2026-31892
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|---|
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IV. Related Vulnerabilities
Same product: argo-workflows
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Argo Workflows: SSO RBAC Delegation Nil Pointer Dereference - CVE-2026-42297
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Same vendor: argoproj
- CVE-2026-42296
Argo Workflows has incomplete fix for CVE-2026-31892: hostNe - CVE-2026-42295
Argo Workflows: Exposure of artifact repository credentials - CVE-2026-42294
Argo Workflows: Unauthenticated Memory Exhaustion (DoS) in W - CVE-2026-42183
Argo Workflows: SSO RBAC Delegation Nil Pointer Dereference - CVE-2026-42297
Argo Workflows Is Missing Authorization in Sync ConfigMap Pr
Same weakness: CWE-863
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