CVE-2026-17442 in App Connect Enterprise
Summary
by MITRE • 09/04/2026
IBM App Connect Enterprise 13.0.1.0 through 13.0.8.1, and 12.0.1.0 through 12.0.12.28 and IBM Integration Bus for z/OS 10.1.0.0 through 10.1.0.7 could allow a local attacker to obtain sensitive information due to credentials being written to trace logs in cleartext.
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Analysis
by VulDB Data Team • 09/04/2026
The vulnerability identified within IBM App Connect Enterprise and IBM Integration Bus for z/OS represents a significant data exposure risk stemming from improper handling of authentication materials during system operations. Specifically, versions 13.0.1.0 through 13.0.8.1, as well as the legacy 12.0.1.0 through 12.0.12.28 releases for App Connect Enterprise and z/OS Integration Bus versions 10.1.0.0 through 10.1.0.7, contain a flaw where sensitive credentials are written to trace logs in cleartext format. This issue arises from the logging subsystem's failure to sanitize or mask authentication data before persisting it to disk-based log files. When the application performs operations that require user verification or service-to-service authentication, the underlying mechanism records the raw credential strings rather than abstracted placeholders such as asterisks or hashes.
From a technical perspective, this flaw constitutes an insecure storage and logging practice where sensitive information is exposed through verbose diagnostic outputs. The trace logs are typically stored in directories accessible to users with local access privileges on the host system running the integration engine. Consequently, any local attacker who gains read access to these log files can extract valid usernames and passwords or API keys used by the application for internal communications or external integrations. This exposure bypasses network-level security controls because the data is not transmitted over a wire but rather resides in plaintext on the file system, making it susceptible to offline analysis if an attacker compromises the host environment through other vectors such as weak local account permissions or misconfigured directory access rights.
The operational impact of this vulnerability extends beyond simple credential theft. If attackers obtain these credentials, they can impersonate legitimate services within the enterprise integration architecture. This capability allows for unauthorized data interception, modification, or exfiltration across connected systems that trust the compromised identity. In environments where IBM App Connect Enterprise serves as a central hub for sensitive business processes, such as financial transactions or healthcare records exchange, this breach could lead to severe regulatory non-compliance and significant reputational damage. The attacker does not need sophisticated exploit techniques; they merely require local file system access, which lowers the barrier for exploitation significantly compared to remote code execution vulnerabilities.
This vulnerability aligns with CWE-532, Insecure Information Exposure Through Log Files, as it involves the logging of sensitive data that should be protected from unauthorized disclosure. Furthermore, in the context of the MITRE ATT&CK framework, this behavior facilitates Credential Access techniques, specifically T1078 Valid Accounts or T1552 Unsecured Credentials, where adversaries harvest credentials directly from local system resources to establish persistence and lateral movement capabilities within the network infrastructure. The lack of automatic credential masking violates fundamental security principles regarding data minimization and confidentiality in logging mechanisms.
To mitigate this risk, organizations must immediately apply the vendor-provided patches that address these specific version ranges for both IBM App Connect Enterprise and IBM Integration Bus for z/OS. Until patching is feasible, administrators should implement strict file system permissions to ensure that trace log directories are accessible only by authorized service accounts with minimal privileges, thereby reducing the attack surface for local attackers. Additionally, security teams should audit existing log configurations to disable verbose tracing of authentication-related events in production environments unless absolutely necessary for troubleshooting. Implementing centralized log management solutions with built-in data masking capabilities can also help prevent future occurrences by automatically redacting sensitive fields before logs are persisted or forwarded to analysis platforms. Regular review of logging policies against industry standards such as NIST SP 800-53 SI-4, which mandates monitoring and control of system information flows, is essential to maintain a robust security posture.