How severe is CVE-2026-28229?

CVE-2026-28229 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-28229 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-28229?

CVE-2026-28229 affects Argoproj Argo Workflows. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-28229?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-28229 have an EU (EUVD) identifier?

Yes. CVE-2026-28229 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11196.

When was CVE-2026-28229 published?

CVE-2026-28229 was published on 2026-03-11 and last updated on 2026-06-30.

CVE-2026-28229

CVE-2026-28229 is a critical-severity vulnerability in Argoproj Argo Workflows with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-863.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-11196
Weakness: CWE-863
Affected product: Argoproj Argo Workflows
Published: 2026-03-11
Last modified: 2026-06-30

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.

Frequently asked questions

What is CVE-2026-28229?: 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.
How severe is CVE-2026-28229?: CVE-2026-28229 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-28229 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-28229?: CVE-2026-28229 affects Argoproj Argo Workflows. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-28229?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-28229 have an EU (EUVD) identifier?: Yes. CVE-2026-28229 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11196.
When was CVE-2026-28229 published?: CVE-2026-28229 was published on 2026-03-11 and last updated on 2026-06-30.

References

Affected products (1)

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

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