What’s Vulnerable › Vulnerabilities

CVE-2026-42297: Argo Workflows Is Missing Authorization in Sync ConfigMap Provider

• Severity: high (CVSS 8.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-05-09 · updated 2026-07-24
• Weakness: CWE-862

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: from 4.0.0 before 4.0.5 — fixed in 4.0.5

How to fix

Upgrade to a fixed version: argoproj argo-workflows 4.0.5. Check the vendor advisory for mitigations.

References

• https://github.com/argoproj/argo-workflows/commit/09fff05e0830c14a5e36cc40597ad84881db1ab6
• https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5
• https://github.com/argoproj/argo-workflows/security/advisories/GHSA-xchc-cqwg-g76q
• 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-g76q
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42297.json

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