Missing Authorization in Argo Workflows - CVE-2026-42297
Published: April 23, 2026
Vulnerability identifier: #VU126907
CSH Severity: Medium
CVSS v4: 7.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-42297
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to read and modify synchronization limits and related ConfigMaps.
The vulnerability exists due to improper access control in the Sync Service ConfigMap-backed provider in server/sync/sync_cm.go when handling create, read, update, and delete sync limit requests. A remote user can send crafted API requests to read and modify synchronization limits and related ConfigMaps.
Exploitation requires Argo Server to be running with --auth-mode=server.
Affected software
Argo Workflows
How to mitigate CVE-2026-42297
Install security update from vendor's website.
Argo Workflows - update to 4.0.5