Red Hat Multicluster Engine for Kubernetes InfraEnv.status.conditions[].message insertion of sensitive information into sent data

Summaryinfo

A vulnerability classified as problematic has been found in Red Hat Multicluster Engine for Kubernetes. The impacted element is an unknown function. Performing a manipulation of the argument InfraEnv.status.conditions[].message results in insertion of sensitive information into sent data. This vulnerability is known as CVE-2026-10101. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Red Hat Multicluster Engine for Kubernetes (version now known). This affects some unknown processing. The manipulation of the argument InfraEnv.status.conditions[].message with an unknown input leads to a insertion of sensitive information into sent data vulnerability. CWE is classifying the issue as CWE-201. The code transmits data to another actor, but a portion of the data includes sensitive information that should not be accessible to that actor. This is going to have an impact on confidentiality. The summary by CVE is:

ACM/MCE assisted-service writes raw referenced pull-secret contents into `InfraEnv.status.conditions[].message` when pull-secret validation fails. A namespace principal with the stock `view` ClusterRole cannot directly read Secrets, but can read `InfraEnv` objects and recover the referenced Secret's `.dockerconfigjson` data from status. This bypasses the Kubernetes/OpenShift RBAC separation between read-only namespace viewers and Secret readers. In the reproduced proof, the same ServiceAccount was denied `get` and `list` on Secrets, but recovered synthetic pull-secret `username`, `password`, `email`, and base64 `auth` fields through `InfraEnv.status`.

It is possible to read the advisory at access.redhat.com. This vulnerability is uniquely identified as CVE-2026-10101 since 05/29/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 05/30/2026). The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-33342). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Virtualization Software

Vendor

• Red Hat

Name

• Multicluster Engine for Kubernetes

License

• open-source

Website

• Vendor: https://www.redhat.com/

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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