CVE-2026-86330 in OpenShift Data Foundation
Summary
by MITRE • 09/28/2026
An OS command injection flaw was found in the set_hostname_internal function of NooBaa's cluster_internal_api. This component is responsible for managing the Multi-Cloud Object Gateway in OpenShift Data Foundation. The vulnerability occurs because the hostname parameter is passed directly to a shell command without proper sanitization. An authenticated attacker with administrative privileges can provide a specially crafted hostname containing shell metacharacters to execute arbitrary commands on the host system with the privileges of the NooBaa process.
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Analysis
by VulDB Data Team • 09/28/2026
The vulnerability identified in OpenShift Data Foundation's Multi-Cloud Object Gateway, specifically within the NooBaa cluster_internal_api component, represents a critical OS command injection flaw located in the set_hostname_internal function. This component plays a pivotal role in managing the underlying infrastructure of the storage gateway, which is integral to providing scalable object storage services across hybrid and multi-cloud environments. The core technical deficiency arises from an improper neutralization of special elements used in operating system commands, commonly referred to as CWE-78 or OS Command Injection. In this specific implementation, the hostname parameter provided by the caller is passed directly into a shell command execution context without adequate sanitization or validation mechanisms. This lack of input filtering allows malicious actors to inject arbitrary shell metacharacters that alter the intended logic of the system call, effectively turning a routine configuration operation into a vector for remote code execution.
From an operational perspective, this vulnerability poses a severe risk to the integrity and availability of the OpenShift Data Foundation cluster. Because the set_hostname_internal function operates with elevated privileges necessary to modify system configurations, any command injected through this flaw will execute with the same permissions as the NooBaa process. Typically, such processes run under specific service accounts that may possess significant access rights within the host operating system and the container runtime environment. An authenticated attacker who has obtained administrative privileges can exploit this weakness by supplying a specially crafted hostname string containing shell metacharacters such as semicolons, pipes, or backticks. Upon processing, these characters allow the injection of additional commands that are executed sequentially alongside the intended hostname setting operation. This capability enables the execution of arbitrary system commands, potentially leading to full compromise of the host node running the NooBaa service.
The exploitation of this vulnerability aligns with several techniques documented in the MITRE ATT&CK framework, particularly those related to command and script interpretation within containerized environments. Attackers leveraging this flaw could achieve initial access persistence by modifying system configurations or establishing backdoors through injected commands. Furthermore, depending on the specific commands executed, an attacker might attempt privilege escalation if the NooBaa process runs with root-like privileges or attempts lateral movement across the cluster nodes by interacting with other services exposed to the compromised host. The impact extends beyond simple data exfiltration; it undermines the fundamental security boundaries of the Kubernetes cluster, potentially allowing attackers to escape container isolation and interact directly with the underlying node operating system.
Mitigation strategies must prioritize immediate patching through vendor-provided updates that address this input validation deficiency. Until patches are applied, administrators should enforce strict network segmentation to limit access to the NooBaa API endpoints exclusively to trusted administrative interfaces. Additionally, implementing robust identity and access management controls ensures that only verified personnel with legitimate business needs can invoke administrative functions like set_hostname_internal. It is also advisable to review audit logs for any unusual patterns in hostname configuration requests or unexpected shell activity originating from the NooBaa process containers. Long-term remediation involves adopting secure coding practices that mandate parameterized command execution or alternative APIs that do not rely on direct shell invocation, thereby eliminating the attack surface associated with OS command injection vulnerabilities entirely.