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Vulnerability · Published Mar 11, 2026 · Assigned by GitHub_M

CVE-2026-28229Argo Workflows has unauthorized access to Argo Workflows Template

Critical 9.8

In plain English

A critical-severity incorrect authorization in argo-workflows from argoproj. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.7%top 45.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official 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. This vulnerability is fixed in 4.0.2 and 3.7.11.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Gogithub.com/argoproj/argo-workflowsno fix listedGO-2026-4678
Gogithub.com/argoproj/argo-workflows/v2no fix listedGO-2026-4678
Gogithub.com/argoproj/argo-workflows/v33.7.11GHSA-56px-hm34-xqj5
Gogithub.com/argoproj/argo-workflows/v33.7.11GO-2026-4678
Gogithub.com/argoproj/argo-workflows/v44.0.2GHSA-56px-hm34-xqj5
Gogithub.com/argoproj/argo-workflows/v44.0.2GO-2026-4678

Affected products (as reported)

VendorProductVersions
argoproj argo-workflows >= 4.0.0, < 4.0.2< 3.7.11

Weakness: CWE-863, CWE-306 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References