CVE-2026-42297
Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.52%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 4.0
- 8.5 HIGHCVSS: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/M
- EPSS
- 0.52% probability · 42th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-862, CWE-425
- Affected
- argoproj/argo workflows
- Source
- security-advisories@github.com
References
- https://github.com/argoproj/argo-workflows/commit/09fff05e0830c14a5e36cc40597ad84881db1ab6Patch
- https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5Release Notes
- https://github.com/argoproj/argo-workflows/security/advisories/GHSA-xchc-cqwg-g76qExploit, Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-42297
- https://bugzilla.redhat.com/show_bug.cgi?id=2468448
- https://github.com/argoproj/argo-workflows/security/advisories/GHSA-xchc-cqwg-g76qExploit, Vendor Advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42297.json
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.