Assisted-service: assisted-service: authenticated users can gain administrative access to openshift clusters via credential disclosure

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Summary

CVECVE-2026-7163
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-30 14:16:36 UTC
Updated2026-04-30 22:16:26 UTC
DescriptionA vulnerability in the assisted-service REST API, an optional Assisted Installer (assisted-service) component in the Multicluster Engine (MCE), allows an authenticated user with minimal namespace-scoped privileges to obtain administrative credentials for arbitrary clusters provisioned through the hub. The credentials download endpoint (GET /v2/clusters/{cluster_id}/credentials, which returns the kubeadmin password) and the kubeconfig download endpoint are operational in AUTH_TYPE=local mode, the only authentication mode available in on-premises ACM/MCE hub deployments. The local authenticator unconditionally grants full administrative access to any request bearing a valid JWT, with no per-endpoint restrictions. A valid local JWT is embedded as a plaintext query parameter in InfraEnvStatus.ISODownloadURL and is readable by any user who has get rights on an InfraEnv object in their own namespace. The affected components ship as part of Multicluster Engine (MCE). The Red Hat Advanced Cluster Management (ACM) deployments that include MCE are equally affected. This issue does not affect the hosted SaaS offering (console.redhat.com), which uses a different authentication mode. Successful exploitation gives the attacker the kubeadmin password and kubeconfig for any OpenShift cluster provisioned through the affected hub, granting unrestricted root-level administrative access to those spoke clusters.

Risk And Classification

Primary CVSS: v3.1 6.1 MEDIUM from [email protected]

CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N

Problem Types: CWE-312 | CWE-312 Cleartext Storage of Sensitive Information

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.1MEDIUMCVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N
3.1CNACVSS6.1MEDIUMCVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Red Hat Multicluster Engine For Kubernetes 2.1 unaffected 1776983527 * rpm Not specified
CNA Red Hat Multicluster Engine For Kubernetes 2.11 unaffected 1776987609 * rpm Not specified
CNA Red Hat Multicluster Engine For Kubernetes 2.7 unaffected 1777205801 * rpm Not specified
CNA Red Hat Multicluster Engine For Kubernetes 2.7 unaffected 1777205772 * rpm Not specified

References

ReferenceSourceLinkTags
access.redhat.com/errata/RHSA-2026:12337 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2026:11511 [email protected] access.redhat.com
access.redhat.com/errata/RHSA-2026:11512 [email protected] access.redhat.com
access.redhat.com/security/cve/CVE-2026-7163 [email protected] access.redhat.com
bugzilla.redhat.com/show_bug.cgi [email protected] bugzilla.redhat.com
access.redhat.com/errata/RHSA-2026:12116 [email protected] access.redhat.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: This issue was discovered by Nick Carboni (Red Hat), Omer Vishlitzky (Red Hat), and Riccardo Piccoli (Red Hat). (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-04-27T04:18:06.534ZReported to Red Hat.
CNA2026-04-30T12:00:00.000ZMade public.
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