---
title: "CVE-2026-93991: Argo Workflows - Authorization Bypass"
description: "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."
url: https://panop.io/threat-heartbeat/CVE-2026-93991/
---

# 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 ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-93991)

## 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](https://cwe.mitre.org/data/definitions/639.html)

## 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

- [https://nvd.nist.gov/vuln/detail/CVE-2026-93991](https://nvd.nist.gov/vuln/detail/CVE-2026-93991)
- [https://github.com/argoproj/argo-workflows](https://github.com/argoproj/argo-workflows)
- [https://github.com/argoproj/argo-workflows/commit/a40972386c097ddf816d2e60e13f058bedca53d9](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/releases/tag/v4.1.4)
- [https://github.com/argoproj/argo-workflows/security/advisories/GHSA-q65w-j2vp-47c4](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](https://www.vulncheck.com/advisories/argo-workflows-4.1.0-through-4.1.3-cross-namespace-disclosure-via-negated-selector)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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