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CVE-2026-28229

Argoproj Argo Workflows authentication bypass

9.8 CRITICALPublic exploitEPSS 0.78%
  1. Published11 Mar 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Argoproj Argo Workflows≥ 3.7.0 < 3.7.11 · ≥ 4.0.0 < 4.0.2

Remediation

Fixed in
Argoproj Argo Workflows≥ 3.7.11

References

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Frequently asked

Is CVE-2026-28229 being actively exploited?

CVE-2026-28229 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.78%.

How severe is CVE-2026-28229?

CVE-2026-28229 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.78% probability of exploitation.

Which products are affected by CVE-2026-28229?

Affected products include Argoproj Argo Workflows.

How do I fix CVE-2026-28229?

Upgrade affected software to a fixed version, for example Argoproj Argo Workflows 3.7.11 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-28229 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.