Vulnerability-Lookup

RHSA-2026:11511

Vulnerability from csaf_redhat - Published: 2026-04-29 06:59 - Updated: 2026-04-30 21:35

Summary

Red Hat Security Advisory: Assisted Installer RHEL 8 components for Multicluster Engine for Kubernetes 2.7.10

Severity

Important

Notes

Topic: Assisted installer RHEL 8 components for the multicluster engine for Kubernetes 2.7.10 General Availability release, with updates to container images.

Details: Assisted Installer RHEL 8 integrates components for the general multicluster engine for Kubernetes 2.7.10 release that simplify the process of deploying OpenShift Container Platform clusters. The multicluster engine for Kubernetes provides the foundational components that are necessary for the centralized management of multiple Kubernetes-based clusters across data centers, public clouds, and private clouds. You can use the engine to create new Red Hat OpenShift Container Platform clusters, or to import existing Kubernetes-based clusters for management. After the clusters are managed, you can use the APIs that are provided by the engine to distribute configuration based on placement policy.

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2026-7163

A 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.

6.1 (Medium)


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

CWE-312 - Cleartext Storage of Sensitive Information

Vendor Fix For more information about Assisted Installer, see the following documentation: https://docs.redhat.com/en/documentation/red_hat_advanced_cluster_management_for_kubernetes/2.12/html/clusters/cluster_mce_overview#cim-intro For multicluster engine for Kubernetes, see the following documentation for details on how to install the images: https://docs.redhat.com/en/documentation/red_hat_advanced_cluster_management_for_kubernetes/2.12/html/clusters/cluster_mce_overview#mce-install-intro This documentation will be available after the general availability release of Red Hat Advanced Cluster Management 2.12. https://access.redhat.com/errata/RHSA-2026:11511

References

URL

Category

	https://access.redhat.com/errata/RHSA-2026:11511	self
	https://access.redhat.com/security/cve/CVE-2026-7163	external
	https://access.redhat.com/security/updates/classi…	external
	https://security.access.redhat.com/data/csaf/v2/a…	self
	https://access.redhat.com/security/cve/CVE-2026-7163	self
	https://bugzilla.redhat.com/show_bug.cgi?id=2463152	external
	https://www.cve.org/CVERecord?id=CVE-2026-7163	external
	https://nvd.nist.gov/vuln/detail/CVE-2026-7163	external

Acknowledgments

Red Hat Omer Vishlitzky Nick Carboni Riccardo Piccoli

JSON

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          "organization": "Red Hat",
          "summary": "This issue was discovered by Red Hat."
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      "ids": [
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      "notes": [
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          "category": "description",
          "text": "A 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. \n\nThe 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.\n\nThe affected components ship as part of Multicluster Engine (MCE). The Red Hat Advanced Cluster Management (ACM) deployments that include MCE are equally affected.\nThis issue does not affect the hosted SaaS offering (console.redhat.com), which uses a different authentication mode.\n\nSuccessful 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.",
          "title": "Vulnerability description"
        },
        {
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          "text": "assisted-service: assisted-service: Authenticated users can gain administrative access to OpenShift clusters via credential disclosure",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N",
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            "multicluster engine for Kubernetes 2.7:registry.redhat.io/multicluster-engine/assisted-service-8-rhel8@sha256:211bed4541e76ea5b280dbe111b3ee0adc0ed74aca4c0a02de481b4212513b74_amd64",
            "multicluster engine for Kubernetes 2.7:registry.redhat.io/multicluster-engine/assisted-service-8-rhel8@sha256:8bcaaf6e4ce41945c3f448b5454441a24b89f85dbb0832a035d83f01642892ff_arm64",
            "multicluster engine for Kubernetes 2.7:registry.redhat.io/multicluster-engine/assisted-service-8-rhel8@sha256:968eee9473cdb66d70b08db22bbc887aa4a49658e29c6a73cfee6f30cda0d9e1_ppc64le",
            "multicluster engine for Kubernetes 2.7:registry.redhat.io/multicluster-engine/assisted-service-8-rhel8@sha256:e9a173fc2e1f497ff04828e4906aa81f3249c30e7804b6bc1fecb0f70daef1d3_s390x"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "assisted-service: assisted-service: Authenticated users can gain administrative access to OpenShift clusters via credential disclosure"
    }
  ]
}

CVE-2026-7163 (GCVE-0-2026-7163)

Vulnerability from cvelistv5 – Published: 2026-04-30 13:18 – Updated: 2026-04-30 21:32

Title

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

Summary

Severity ?

6.1 (Medium)


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

CWE

CWE-312 - Cleartext Storage of Sensitive Information

Assigner

redhat

References

URL

Tags

	https://access.redhat.com/errata/RHSA-2026:11511	vendor-advisoryx_refsource_REDHAT
	https://access.redhat.com/errata/RHSA-2026:11512	vendor-advisoryx_refsource_REDHAT
	https://access.redhat.com/errata/RHSA-2026:12116	vendor-advisoryx_refsource_REDHAT
	https://access.redhat.com/errata/RHSA-2026:12337	vendor-advisoryx_refsource_REDHAT
	https://access.redhat.com/security/cve/CVE-2026-7163	vdb-entryx_refsource_REDHAT
	https://bugzilla.redhat.com/show_bug.cgi?id=2463152	issue-trackingx_refsource_REDHAT

Impacted products

Vendor

Product

Version

Red Hat

multicluster engine for Kubernetes 2.1

Unaffected: 1776983527 , < * (rpm)
cpe:/a:redhat:multicluster_engine:2.10::el9

Red Hat	multicluster engine for Kubernetes 2.11	Unaffected: 1776987609 , < * (rpm) cpe:/a:redhat:multicluster_engine:2.11::el9
Red Hat	multicluster engine for Kubernetes 2.7	Unaffected: 1777205801 , < * (rpm) cpe:/a:redhat:multicluster_engine:2.7::el8
Red Hat	multicluster engine for Kubernetes 2.7	Unaffected: 1777205772 , < * (rpm) cpe:/a:redhat:multicluster_engine:2.7::el9

Date Public ?

2026-04-30 12:00

Credits

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

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

RHSA-2026:11511

CVE-2026-7163 (GCVE-0-2026-7163)

Tags

Sightings

Nomenclature