CVE-2026-66138 in Ironic Python Agent
Summary
by MITRE • 07/24/2026
In OpenStack Ironic Python Agent through 11.6.0, a project-scoped user with the manager role can achieve arbitrary code execution on a running Ironic-Python-Agent via a maliciously constructed configuration, because the value of ntp_server is passed to a shell.
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Analysis
by VulDB Data Team • 07/24/2026
OpenStack Ironic Python Agent represents a critical component in OpenStack's bare metal provisioning infrastructure, serving as the agent that runs on target nodes during deployment operations. The vulnerability under examination stems from insufficient input validation within the agent's configuration handling mechanism, specifically affecting versions through 11.6.0. This weakness manifests when a project-scoped user holding the manager role manipulates the ntp_server parameter within the agent's configuration, creating a dangerous scenario where user-supplied input directly influences shell execution contexts.
The technical flaw resides in the improper sanitization of the ntp_server configuration value which gets passed to shell commands without adequate escaping or validation. This type of vulnerability aligns with CWE-78, known as "Improper Neutralization of Special Elements used in an OS Command," and represents a classic command injection vector. The attack surface becomes particularly dangerous because it allows authenticated users with specific role privileges to escalate their access beyond the intended scope of their permissions. When the maliciously constructed configuration is processed, the shell execution context receives untrusted input that can contain arbitrary commands, enabling full code execution capabilities on the target system.
The operational impact of this vulnerability extends beyond simple privilege escalation as it fundamentally undermines the security boundaries within OpenStack deployments. An attacker with project-scoped manager privileges can leverage this flaw to execute arbitrary code with the privileges of the Ironic Python Agent process, potentially leading to complete compromise of the bare metal provisioning infrastructure. This vulnerability is particularly concerning in multi-tenant environments where different projects share the same OpenStack deployment, as it allows for lateral movement and information disclosure across project boundaries. The attack vector also enables potential persistence mechanisms within the agent's operational context, making detection and remediation more challenging.
Mitigation strategies should prioritize immediate patching to versions that address the command injection vulnerability through proper input validation and sanitization of configuration parameters. Implementing strict configuration validation procedures that reject potentially dangerous characters or patterns within ntp_server values would prevent malicious inputs from reaching shell execution contexts. Network segmentation and least privilege principles should be enforced to limit the scope of potential exploitation, ensuring that even if an attacker compromises one project's manager role, they cannot easily move laterally across other projects. Additionally, monitoring for unusual configuration changes and shell command executions should be implemented as part of security operations centers' defensive measures. The vulnerability demonstrates the importance of adhering to secure coding practices and proper input sanitization, particularly when dealing with user-supplied values that may eventually reach system-level execution contexts. Organizations should also consider implementing runtime protection mechanisms that can detect and prevent command injection attempts in real-time, aligning with ATT&CK framework techniques targeting command and scripting interpreters for privilege escalation and persistence.