CVE-2026-17392 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 gain unauthorized administrative access to other tenants due to LDAP injection. User-supplied input is not properly neutralized in directory queries, which could change the query and grant access beyond the user's own tenant.
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Analysis
by VulDB Data Team • 11/07/2026
The vulnerability identified within IBM API Connect versions 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 represents a critical security flaw rooted in improper input validation during directory service interactions. Specifically, the application fails to adequately neutralize user-supplied data before incorporating it into Lightweight Directory Access Protocol queries. This lack of sanitization allows an attacker who has already obtained authenticated credentials within one tenant environment to manipulate these LDAP requests. By injecting maliciously crafted characters or logical operators into fields that are directly passed to the directory server, the structure of the query can be altered from its intended purpose. This manipulation enables the attacker to bypass access controls and retrieve information or perform actions associated with other tenants sharing the same underlying infrastructure, effectively breaking down the multi-tenancy isolation model that is fundamental to secure cloud-based API management platforms.
From a technical perspective, this flaw aligns closely with Common Weakness Enumeration category CWE-90, which classifies LDAP Injection vulnerabilities where untrusted input is used in an LDAP query without proper validation or escaping. The operational impact of such a vulnerability extends far beyond simple data leakage; it constitutes a severe breach of tenant isolation. In multi-tenant environments, the security boundary between different organizations or departments relies heavily on strict separation at both the application and database levels. When an attacker can influence directory queries to return results belonging to other tenants, they may gain unauthorized administrative access to those entities' APIs, configurations, or sensitive data. This capability allows for lateral movement within the platform, potentially leading to complete compromise of multiple organizations depending on the privileges associated with the injected query outcomes.
The exploitation vector requires an authenticated user, which places this vulnerability in the context of privilege escalation and cross-tenant attacks rather than unauthenticated remote code execution. However, the ease with which LDAP injection can be executed once authentication is achieved makes it a high-risk issue for organizations relying on IBM API Connect for their integration needs. Attackers typically utilize standard tools or custom scripts to fuzz input fields such as usernames, search filters, or attribute values that are reflected in backend directory lookups. By observing differences in response times or error messages, an attacker can iteratively refine the injection payload until they successfully extract data from other tenants' contexts. This process does not require complex reverse engineering of the application logic but rather relies on understanding how LDAP queries are constructed and executed by the underlying service.
To mitigate this risk, immediate remediation involves upgrading to a patched version of IBM API Connect that addresses these input validation deficiencies. In addition to software updates, organizations should implement strict input validation strategies at the application layer, ensuring that all user-supplied data is sanitized against LDAP special characters such as parentheses, asterisks, and null bytes before being used in directory queries. Parameterized queries or prepared statements where supported by the LDAP client library can also help prevent injection by separating code from data. Furthermore, adopting a defense-in-depth approach includes monitoring for anomalous query patterns that deviate from normal usage profiles, which may indicate an ongoing exploitation attempt. Regular security assessments and penetration testing focused on multi-tenant isolation boundaries are essential to verify that such vulnerabilities have been effectively neutralized in production environments.
This vulnerability is categorized under MITRE ATT&CK technique T1078, specifically relating to valid accounts used for lateral movement or privilege escalation within a networked environment. The failure to enforce strict context separation during directory operations highlights the importance of rigorous security controls around identity and access management systems. Organizations must ensure that their API gateways and integration platforms are configured with the principle of least privilege in mind, limiting what authenticated users can query and manipulate within shared infrastructure components. By addressing these foundational weaknesses, enterprises can maintain robust multi-tenancy guarantees and protect against cross-tenant data exfiltration or administrative takeover attempts facilitated by LDAP injection flaws.