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EUVD-2026-337390

2026-10-03T08:01:58.708025+00:00

EUVD-2026-337390

fkie_cve-2026-28229

2026-10-03T08:01:58.708062+00:00

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.

GHSA-56px-hm34-xqj5 — Unauthorized access to Argo Workflows Template

2026-10-03T08:01:58.708095+00:00

Affected: Go: github.com/argoproj/argo-workflows/v3, Go: github.com/argoproj/argo-workflows/v4

### 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 workflowtempl…

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

2026-10-03T08:01:58.708151+00:00

vllm: Server Side request forgery (SSRF) in MediaConnector feast: Feast: Remote Code Execution via insecure YAML deserialization openshift-ai: Trusty AI Grants All Authenticated users to list pods in any namespace nltk: Zip Slip Vulnerability in nltk Leading to Code Execution golang: net/url: Memory exhaustion in query parameter parsing in net/url golang: archive/zip: Excessive CPU consumption when building archive index in archive/zip crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate urllib3: urllib3: Unbounded decompression chain leads to resource exhaustion urllib3: urllib3 Streaming API improperly handles highly compressed data cbor2: cbor2: Information Disclosure via shared memory in CBORDecoder reuse aiohttp: AIOHTTP's HTTP Parser auto_decompress feature is vulnerable to zip bomb aiohttp: aiohttp: Denial of Service via specially crafted POST request aiohttp: aiohttp: Denial of Service via memory exhaustion from crafted POST request python-markdown: denial of service via malformed HTML-like sequences nltk: NLTK: Arbitrary file read via improper path validation in `filestring()` function nltk: NLTK: Arbitrary file read via path traversal vulnerability io.vertx/vertx-core: static handler component cache can be manipulated to deny the access to static files google-cloud-aiplatform: google-cloud-aiplatform: Arbitrary code execution via Stored Cross-Site Scripting (XSS) tensorflow: TensorFlow: Local privilege escalation via…