CVE-2026-17377 in API Connect
Summary
by MITRE • 11/07/2026
IBM API Connect 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 could allow a remote authenticated attacker to forge audit records due to improper output neutralization for logs.
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Analysis
by VulDB Data Team • 11/07/2026
The vulnerability identified in IBM API Connect versions ranging from 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 represents a significant integrity risk within the application's logging subsystem. This flaw stems from improper output neutralization when handling data that is written to audit logs. In secure software design, any user-supplied input or dynamic content destined for log files must be strictly sanitized and encoded before being rendered into the final text stream. The absence of such neutralization allows an attacker who has already achieved authenticated access to inject malicious sequences directly into these records. This specific technical failure aligns with Common Weakness Enumeration identifier CWE-117, which describes Improper Output Neutralization for Logs, a category of vulnerabilities where insufficient validation or encoding leads to log injection attacks that can obscure legitimate activity or create false trails.
The operational impact of this vulnerability is primarily centered on the integrity and reliability of security monitoring and forensic analysis capabilities. Audit logs serve as the primary source of truth for understanding system usage, detecting anomalies, and conducting post-incident forensics. By forging these records, an authenticated attacker can manipulate the narrative of events recorded by the system. This capability allows the adversary to mask their malicious activities from intrusion detection systems and security information and event management platforms that rely on log analysis. Furthermore, it enables the creation of false evidence pointing toward other users or processes, potentially leading to incorrect attribution during incident response efforts. The ability to alter audit trails undermines trust in the system's accountability mechanisms, which is critical for compliance with regulatory standards such as PCI DSS and HIPAA that mandate accurate logging of access and actions.
From a threat modeling perspective, this vulnerability facilitates activities categorized under MITRE ATT&CK technique T1078, specifically Valid Accounts, combined with log manipulation tactics often associated with persistence or defense evasion strategies like T1562 Impair Defenses via Log Injection. An attacker leveraging this flaw does not need to escalate privileges beyond their current authenticated state but must possess valid credentials within the API Connect environment. The exploitation vector is remote and requires authentication, which limits the attack surface compared to unauthenticated vulnerabilities but still poses a severe risk in environments where insider threats or compromised service accounts are prevalent.
Mitigation strategies for this vulnerability involve immediate application of vendor-provided patches that address the input validation logic within the logging components. Organizations should ensure they upgrade IBM API Connect to versions beyond 10.0.8.12 and 12.1.1.2 where these neutralization checks are properly implemented. In addition to patching, defensive measures include implementing strict access controls on log files themselves to prevent unauthorized modification even if injection occurs, deploying agent-based monitoring that captures logs at the operating system level before they can be tampered with by application processes, and conducting regular reviews of audit trails for anomalies indicative of injection attempts such as unexpected control characters or malformed entries.