CVE-2026-42297
Medium
Elevated severity or exploit probability.
CVSS base
8.3
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
EPSS — probability of exploitation (30 days)
0.5%
42.7th percentile
CISA KEV
Not listed
Weakness / dates
CWE-425
Published 2026-05-09 · modified 2026-07-24
CVSS breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
| Attack Vector | N | Network |
| Attack Complexity | L | Low |
| Privileges Required | L | Low |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | L | Low |
| Integrity | H | High |
| Availability | H | High |
Timeline
- 2026-05-09 — Published (NVD)
- 2026-07-24 — Last modified (NVD)
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
References
- https://github.com/argoproj/argo-workflows/commit/09fff05e0830c14a5e36cc40597ad84881db1ab6
- https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5
- exploit 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
- exploit 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