High severity · published May 9, 2026
CVE-2026-42297
Argo Workflows Is Missing Authorization in Sync ConfigMap Provider
8.3
CVSS
0.5%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 44% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AR
argo-workflows · argoproj
>= 4.0.0, < 4.0.5 · source: vendor
AW
Argo Workflows · Argoproj
4.0.0 before 4.0.5 · source: NVD
RH
Red Hat OpenShift AI (RHOAI) · Red Hat
All versions, or not specified · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-42297
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-42297
Patch
https://github.com/argoproj/argo-workflows/commit/09fff05e0830c14a5e36cc40597ad84881db1ab6
Release Notes
https://github.com/argoproj/argo-workflows/releases/tag/v4.0.5
Exploit
https://github.com/argoproj/argo-workflows/security/advisories/GHSA-xchc-cqwg-g76q
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-42297
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2468448
security.access.redhat.com
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42297.json
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