CVE-2026-81550 in DataStage on Cloud Pak for Data
Summary
by MITRE • 09/11/2026
IBM DataStage on Cloud Pak for Data 5.4.0.0 could allow a remote authenticated attacker to execute arbitrary code due to improper neutralization of special elements used in an OS command.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 09/11/2026
The vulnerability identified within IBM DataStage, specifically as part of the Cloud Pak for Data version 5.4.0.0 environment, represents a critical security flaw rooted in the failure to properly sanitize user-supplied input before its inclusion in operating system commands. This class of defect is technically classified under Common Weakness Enumeration (CWE) ID 78, known as Improper Neutralization of Special Elements used in an OS Command, which is more commonly referred to as OS command injection. The core technical flaw arises when the application accepts input from a remote authenticated user and incorporates that data directly into system-level commands without adequate validation or escaping mechanisms. In such scenarios, if the input contains special characters or sequences designed for shell interpretation, these elements are executed by the underlying operating system rather than being treated as literal string data. This lack of neutralization allows an attacker to manipulate the intended command structure, effectively injecting additional malicious instructions that run with the privileges associated with the application process.
From a technical perspective, this vulnerability leverages the trust relationship between the authenticated user and the DataStage service. Because the attacker is already authenticated, they bypass initial access controls but exploit the subsequent processing logic where input handling is deficient. The operational impact of such a flaw is severe, as it can lead to arbitrary code execution on the host system running the IBM DataStage services. An adversary could potentially read sensitive configuration files, exfiltrate data stored within the data integration pipelines, modify or delete critical job definitions, and even use the compromised server as a pivot point for further attacks against other systems in the network infrastructure. The severity is amplified by the fact that Cloud Pak for Data often runs with elevated privileges to manage complex containerized environments, meaning successful exploitation could grant the attacker significant control over the underlying Kubernetes cluster or host operating system.
This vulnerability aligns closely with MITRE ATT&CK technique T1059, specifically sub-technique 008 which covers Command and Scripting Interpreter abuse for remote code execution. The attack vector is classified as Remote (Network) but requires Authentication, placing it at a medium complexity level in terms of initial access requirements, though the impact remains high due to the potential for full system compromise. Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. IBM has released patches addressing this specific issue within Cloud Pak for Data 5.4.0.0, making the application of these updates the primary defensive measure. Administrators should ensure that all instances are updated to the latest secure version as soon as possible. Beyond patching, defense-in-depth measures include implementing strict input validation frameworks that whitelist allowed characters rather than relying on blacklist approaches, which can be bypassed through encoding or obfuscation techniques. Additionally, applying principle of least privilege ensures that even if exploitation occurs, the damage is contained by restricting the permissions of the DataStage service account to only those necessary for its operation.