CVE-2026-93991

EUVD-2026-83619

19.09.2026, 23:17

Argo Workflows versions 4.1.0 through 4.1.3 contain an authorization bypass vulnerability in ListArchivedWorkflows that fails to apply cluster-scoped access review when the metadata.namespace field selector uses the NotEquals operator. Attackers with namespace-scoped list permissions can use a negated namespace field selector to retrieve archived workflows from all other namespaces, exposing spec arguments, parameter values, and annotations.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
VulnCheck	CNA	7.7 HIGH	NETWORK	LOW	LOW	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Base Score

CVSS 3.x

EPSS Score

Percentile: 25.92%

Early Detection

Affected products identified ahead of NVD analysis through intelligence sources.

Vendor	Product	Version	Source
argoproj	argo_workflows	4.1.0 ≤ 𝑥 < 4.1.4	CNA

Common Weakness Enumeration

CWE-639 - Authorization Bypass Through User-Controlled Key
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

References

https://github.com/argoproj/argo-workflows

https://github.com/argoproj/argo-workflows/commit/a40972386c097ddf816d2e60e13f058bedca53d9

https://github.com/argoproj/argo-workflows/releases/tag/v4.1.4

https://github.com/argoproj/argo-workflows/security/advisories/GHSA-q65w-j2vp-47c4

https://www.vulncheck.com/advisories/argo-workflows-4.1.0-through-4.1.3-cross-namespace-disclosure-via-negated-selector