CVE-2026-10101: Insertion of Sensitive Information Into Sent Data in Red Hat Multicluster Engine for Kubernetes
CVE-2026-10101 is a vulnerability in Red Hat Multicluster Engine for Kubernetes where sensitive pull-secret information is written into the status message of InfraEnv objects when pull-secret validation fails. This allows a namespace principal with only the 'view' ClusterRole, which normally cannot read Secrets, to access sensitive secret data through the InfraEnv. status field. This behavior bypasses Kubernetes/OpenShift RBAC controls separating read-only viewers from Secret readers.
AI Analysis
Technical Summary
The vulnerability occurs because the ACM/MCE assisted-service writes raw referenced pull-secret contents into the InfraEnv.status.conditions[].message field upon pull-secret validation failure. Although a namespace principal with the default 'view' ClusterRole cannot directly read Kubernetes Secrets, it can read InfraEnv objects and thereby recover sensitive secret data such as the .dockerconfigjson contents, including username, password, email, and base64 auth fields. This effectively bypasses RBAC restrictions designed to prevent read-only namespace viewers from accessing Secrets. The CVSS 3.1 score is 6.3 (medium severity) with vector AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N.
Potential Impact
An attacker with read access to InfraEnv objects and the 'view' ClusterRole in a namespace can obtain sensitive pull-secret credentials that should be protected by Kubernetes RBAC controls. This leads to confidentiality loss of secret data, potentially allowing unauthorized access to container registries or other resources relying on these secrets. The integrity and availability impacts are low.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-10101 for current remediation guidance. Until an official fix is available, restrict access to InfraEnv objects and monitor for unusual access patterns. Avoid granting the 'view' ClusterRole broadly in namespaces where sensitive pull-secrets are referenced. Follow vendor guidance for updates or workarounds once published.
CVE-2026-10101: Insertion of Sensitive Information Into Sent Data in Red Hat Multicluster Engine for Kubernetes
Description
CVE-2026-10101 is a vulnerability in Red Hat Multicluster Engine for Kubernetes where sensitive pull-secret information is written into the status message of InfraEnv objects when pull-secret validation fails. This allows a namespace principal with only the 'view' ClusterRole, which normally cannot read Secrets, to access sensitive secret data through the InfraEnv. status field. This behavior bypasses Kubernetes/OpenShift RBAC controls separating read-only viewers from Secret readers.
CVSS v3.1
Score 6.3medium
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability occurs because the ACM/MCE assisted-service writes raw referenced pull-secret contents into the InfraEnv.status.conditions[].message field upon pull-secret validation failure. Although a namespace principal with the default 'view' ClusterRole cannot directly read Kubernetes Secrets, it can read InfraEnv objects and thereby recover sensitive secret data such as the .dockerconfigjson contents, including username, password, email, and base64 auth fields. This effectively bypasses RBAC restrictions designed to prevent read-only namespace viewers from accessing Secrets. The CVSS 3.1 score is 6.3 (medium severity) with vector AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N.
Potential Impact
An attacker with read access to InfraEnv objects and the 'view' ClusterRole in a namespace can obtain sensitive pull-secret credentials that should be protected by Kubernetes RBAC controls. This leads to confidentiality loss of secret data, potentially allowing unauthorized access to container registries or other resources relying on these secrets. The integrity and availability impacts are low.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-10101 for current remediation guidance. Until an official fix is available, restrict access to InfraEnv objects and monitor for unusual access patterns. Avoid granting the 'view' ClusterRole broadly in namespaces where sensitive pull-secrets are referenced. Follow vendor guidance for updates or workarounds once published.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-05-29T15:07:59.753Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-10101","vendor":"Red Hat"}]
Threat ID: 6a19bc63e29bf47b50f702d8
Added to database: 5/29/2026, 4:18:43 PM
Last enriched: 5/29/2026, 4:34:50 PM
Last updated: 5/29/2026, 5:28:27 PM
Views: 3
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