Stored XSS in Argo Workflows Artifact Directory Enables Privilege Escalation

Publication date: 2026-01-21

Last updated on: 2026-06-30

Assigner: GitHub, Inc.

Description

Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. Prior to versions 3.6.17 and 3.7.8, stored XSS in the artifact directory listing allows any workflow author to execute arbitrary JavaScript in another user’s browser under the Argo Server origin, enabling API actions with the victim’s privileges. Versions 3.6.17 and 3.7.8 fix the issue.

CVSS Scores

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Meta Information

Published

2026-01-21

Last Modified

2026-06-30

Generated

2026-07-06

AI Q&A

2026-01-22

EPSS Evaluated

2026-07-05

NVD

CVE-2026-23960

Affected Vendors & Products

Vendor	Product	Version / Range
argoproj	argo_workflows	to 3.6.17 (exc)
argoproj	argo_workflows	From 3.7.0 (inc) to 3.7.8 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-79	The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

Executive Summary

This vulnerability is a stored Cross-Site Scripting (XSS) issue in Argo Workflows prior to versions 3.6.17 and 3.7.8. It occurs in the artifact directory listing, allowing any workflow author to inject and execute arbitrary JavaScript code in another user's browser under the Argo Server origin. This means that malicious scripts can run with the victim's privileges within the Argo Server environment.

Impact Analysis

The vulnerability can allow an attacker who is a workflow author to execute arbitrary JavaScript in the browsers of other users. This can lead to unauthorized API actions being performed with the victim's privileges, potentially compromising data integrity, confidentiality, and availability within the Argo Workflows environment.

Mitigation Strategies

Upgrade Argo Workflows to version 3.6.17 or 3.7.8 or later, as these versions contain fixes for the stored XSS vulnerability.

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