CVE-2026-28229

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.

How to fix CVE-2026-28229

To remediate CVE-2026-28229, upgrade the affected package to a fixed version below.

—upgrade to 3.7.11 or later
—no fix listed
—no fix listed
—upgrade to 3.7.11 or later
—upgrade to 3.7.11 or later
—upgrade to 4.0.2 or later
—upgrade to 4.0.2 or later

Is CVE-2026-28229 being exploited?

Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.

Affected packages (7)

from 0, < 3.7.11, >= 4.0.0, < 4.0.2
from 0
from 0
from 0, < 3.7.11
>= 3.7.0, < 3.7.11
from 0, < 4.0.2
from 0, < 4.0.2

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	HIGH7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N