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CVE-2026-93991

7.7 · HIGH

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…

Published Sep 19, 2026CWE-639EPSS 0.44%

Overview

CVE-2026-93991 is a high-severity vulnerability. It was published on September 19, 2026 and has a CVSS 3.1 base score of 7.7 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/argoproj/argo-workflowsGitHubgithub.com/argoproj/argo-workflows/commit/a40972386c097ddf816d2e60e13f058bedca53d9GitHubgithub.com/argoproj/argo-workflows/releases/tag/v4.1.4GitHubgithub.com/argoproj/argo-workflows/security/advisories/GHSA-q65w-j2vp-47c4Refwww.vulncheck.com/advisories/argo-workflows-4.1.0-through-4.1.3-cross-namespace-disclosure-via-negated-selector

How CyberStrike helps

Frequently asked questions

What is CVE-2026-93991?

CVE-2026-93991 is a high-severity vulnerability. It was published on September 19, 2026 and has a CVSS 3.1 base score of 7.7 (HIGH).

How severe is CVE-2026-93991?

This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-93991?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-93991?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-93991 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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