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CVE-2026-42296— Argo Workflows has incomplete fix for CVE-2026-31892: hostNetwork, securityContext, serviceAccountName bypass templateReferencing Strict/Secure

CVSS 8.1 · High EPSS 0.03% · P10

Affected Version Matrix 2

VendorProductVersion RangeStatus
argoprojargo-workflows< 3.7.14affected
>= 4.0.0, < 4.0.5affected
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I. Basic Information for CVE-2026-42296

Vulnerability Information
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Vulnerability Title
Argo Workflows has incomplete fix for CVE-2026-31892: hostNetwork, securityContext, serviceAccountName bypass templateReferencing Strict/Secure
Source: NVD (National Vulnerability Database)
Vulnerability Description
Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. Prior to versions 3.7.14 and 4.0.5, a user with create Workflow permission can bypass templateReferencing: Strict to get host network access, switch service accounts, override pod security context, add tolerations to schedule on control-plane nodes, or enable SA token mounting. This defeats the stated purpose of the feature. The practical impact depends on what Kubernetes-level controls are in place. Clusters with PodSecurity admission or OPA/Gatekeeper would independently block some of these (like hostNetwork). Clusters that rely on Argo's Strict mode as the primary enforcement layer are fully exposed. This issue has been patched in versions 3.7.14 and 4.0.5.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
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 3.7.14之前版本和4.0.5之前版本存在安全漏洞，该漏洞源于具有创建Workflow权限的用户可以绕过templateReferencing: Strict限制，可能导致获取主机网络访问、切换服务账户、覆盖Pod安全上下文、添加容忍度调度到控制平面节点或启用SA令牌挂载。
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

VendorProductAffected VersionsCPESubscribe
argoprojargo-workflows < 3.7.14 -

II. Public POCs for CVE-2026-42296

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 8525 chars
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III. Intelligence Information for CVE-2026-42296

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Advisory · 1Patch · 1

Same Patch Batch · argoproj · 2026-05-09 · 5 CVEs total

CVE-2026-42294Argo Workflows: Unauthenticated Memory Exhaustion (DoS) in Webhook Interceptor
CVE-2026-42297Argo Workflows Is Missing Authorization in Sync ConfigMap Provider
CVE-2026-42183Argo Workflows: SSO RBAC Delegation Nil Pointer Dereference DoS (gatekeeper.go)
CVE-2026-42295Argo Workflows: Exposure of artifact repository credentials

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-42296

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