Description
Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. From version 4.0.0 to before version 4.0.5, the Sync Service's ConfigMap-backed provider (server/sync/sync_cm.go) performs zero authorization checks on all CRUD operations (create, read, update, delete). Any authenticated user — including those using fake Bearer tokens — can create, read, update, and delete Kubernetes ConfigMaps containing synchronization limits. This issue has been patched in version 4.0.5.
Affected products
argoproj: argo workflows
References7
- github.com/argoproj/argo-workflows/security/advisories/GHSA-xch… ExploitVendor Advisory
- github.com/argoproj/argo-workflows/security/advisories/GHSA-xch… ExploitVendor Advisory
- github.com/argoproj/argo-workflows/commit/09fff05e0830c14a5e36c… Patch
- github.com/argoproj/argo-workflows/releases/tag/v4.0.5 Release Notes
- access.redhat.com/security/cve/CVE-2026-42297
- bugzilla.redhat.com/show_bug.cgi?id=2468448
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42297…
Metrics
- CVSS 3.1
-
8.3
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H - CVSS 4.0
-
8.5
HIGH
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 1% percentile: 44 · as of 13 November 2026
- CWE
- CWE-862CWE-425
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.