CVE-2026-11864 in Cloud Pak for Business Automation
Summary
by MITRE • 09/15/2026
IBM Cloud Pak for Business Automation 26.0.0 through 26.0.0 Interim Fix 001, 25.0.0 through 25.0.0 Interim Fix 005, 24.0.1 through 24.0.1 Interim Fix 008, and 24.0.0 through 24.0.0 Interim Fix 009 is vulnerable to an XPath injection vulnerability, which could allow an authenticated attacker to exfiltrate sensitive application data and/or determine the structure of the XML document.
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Analysis
by VulDB Data Team • 09/15/2026
The identified security flaw resides within IBM Cloud Pak for Business Automation across multiple version ranges including versions 26.0.0 through its initial interim fix, as well as earlier releases in the 25.0.0 and 24.0.x series up to their respective latest interim fixes. This vulnerability is classified as an XPath injection attack, a critical web application security risk that arises when user-supplied input is improperly sanitized before being incorporated into an XPath query used for XML document processing. The core technical deficiency involves the failure of the application logic to adequately validate or escape special characters within data inputs that are subsequently utilized in dynamic XPath expressions. When an attacker constructs maliciously crafted input containing XPath metacharacters such as quotes, brackets, and logical operators, they can manipulate the structure of the query itself rather than merely providing a value for it. This manipulation allows the injected code to alter the intended logic of the database or XML search operation, effectively bypassing authentication controls or expanding the scope of data retrieval beyond what was originally authorized by the application design.
From an operational perspective, this vulnerability poses a severe risk to the confidentiality and integrity of enterprise automation workflows managed through IBM Cloud Pak for Business Automation. Because the attack requires prior authentication, it targets users who have already gained access to the system but may possess limited privileges or are attempting to escalate their access rights. An authenticated attacker can exploit this flaw to exfiltrate sensitive application data that should remain restricted, such as personally identifiable information, financial records, or proprietary business logic configurations. Furthermore, by observing error messages and response times resulting from crafted queries, an adversary can perform schema discovery attacks to determine the structure of underlying XML documents. This reconnaissance capability facilitates further exploitation attempts, allowing the attacker to map out data stores and identify additional targets for more sophisticated attacks such as SQL injection if similar patterns exist in other components or lateral movement within the cloud environment.
The technical classification of this issue aligns with Common Weakness Enumeration identifier CWE-643, which describes Improper Neutralization of XPath Special Elements in an XPath Query allowing for XPath Injection. This weakness is fundamentally rooted in a lack of input validation and output encoding specific to XML query contexts. In the context of the MITRE ATT&CK framework, this vulnerability enables techniques associated with Collection from Local System or Data Staged via Network Service depending on how the exfiltrated data is handled post-exploitation. It also relates to Defense Evasion through Obfuscated Inputs if attackers use encoding tricks to bypass basic security filters. The impact extends beyond simple data theft as it undermines the trust model of the automation platform, potentially leading to unauthorized modifications or deletions of critical business process definitions and workflow states if write operations are exposed through similar injection vectors in other parts of the application stack.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. The primary defense is for organizations running affected versions to apply the specific interim fixes provided by IBM, which patch the underlying code responsible for handling XPath queries. These patches typically involve implementing strict input validation that rejects or safely encodes special characters before they reach the query engine. Beyond applying vendor updates, developers should adopt parameterized XPath queries where possible, ensuring that user inputs are treated strictly as data values rather than executable parts of the query structure. Additionally, employing a whitelist approach for allowed input patterns can significantly reduce the attack surface by rejecting any character sequences not explicitly defined as valid for specific fields. Security teams should also implement robust logging and monitoring to detect anomalous XPath queries characterized by unusual syntax or high-frequency error responses indicative of injection attempts. Regular security assessments including static application security testing focused on XML processing libraries will help identify similar vulnerabilities in custom integrations built atop the Cloud Pak platform, ensuring comprehensive protection against this class of attacks.