Authorization bypass through user-controlled key in Argo Workflows - CVE-2026-93991
Published: September 22, 2026
Vulnerability identifier: #VU151675
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93991
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to improper authorization in the ListArchivedWorkflows handler when processing metadata.namespace!= field selectors. A remote user can submit a crafted archived-workflow list request to disclose sensitive information.
Exploitation requires namespace-scoped permission to list workflows in a namespace controlled by the user.
Affected software
Argo Workflows
How to mitigate CVE-2026-93991
Install security update from vendor's website.
Argo Workflows - update to 4.1.4