CVE-2026-93991 Argo Workflows - Authorization Bypass

Argo Workflows 4.1.0 through 4.1.3 contain an authorization bypass caused by improper cluster-scoped access review in ListArchivedWorkflows with NotEquals namespace field selector, letting attackers with namespace-scoped list permissions access archived workflows across namespaces.

CVSS base score 7.7 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.44% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authorization Bypass
Impact
Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Published
19 September 2026
Updated
15 October 2026
Weakness
CWE-639

Vendor fix

Upgrade to a version later than 4.1.3 or the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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