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CVE-2026-3144 - IBM API Connect Default Credentials Vulnerability

IBM API Connect versions 12.1.0.0 through 12.1.0.3 are vulnerable to unauthorized access due to the use of default credentials, allowing an attacker to gain initial access to the application before the system enforces a credential update.

IBM has disclosed CVE-2026-3144, affecting IBM API Connect versions 12.1.0.0 through 12.1.0.3. This critical vulnerability stems from the application's use of default credentials, which attackers can leverage to gain unauthorized access. The issue allows threat actors to bypass authentication mechanisms before the system enforces a mandatory credential update. This provides a straightforward initial access vector, enabling adversaries to potentially control API configurations, access sensitive data, or establish further persistence within compromised environments. Organizations utilizing the affected versions should prioritize immediate remediation to prevent unauthorized exploitation and mitigate the risk of severe operational and data security impacts.

Attack Chain

  1. Attacker conducts reconnaissance to identify internet-facing IBM API Connect instances within versions 12.1.0.0 through 12.1.0.3.
  2. Attacker attempts to authenticate to the identified API Connect management interface (e.g., via the login endpoint) using commonly known default usernames and passwords (e.g., 'admin'/'admin', 'user'/'password').
  3. Due to the vulnerability (CWE-1392), the application successfully authenticates the attacker using the hardcoded or easily guessable default credentials.
  4. Attacker gains full unauthorized access to the IBM API Connect management console and its functionalities, inheriting privileges associated with the default account.
  5. Attacker performs actions such as modifying API definitions, creating new APIs, or accessing API analytics and sensitive configuration data.
  6. The unauthorized access could enable sensitive data exposure, API manipulation, or the establishment of a foothold for lateral movement into connected internal systems.

Impact

Exploitation of CVE-2026-3144 grants an unauthenticated attacker high privileges over the IBM API Connect platform, as indicated by its CVSS 3.1 score of 8.1. If successfully exploited, adversaries can gain complete control over API management, potentially leading to widespread disruption of services, unauthorized data access or exfiltration, and the creation of backdoors for future access. Organizations managing critical business APIs via affected versions face significant risks, including reputational damage, compliance failures, and severe operational interruptions if their API infrastructure is compromised. The vulnerability applies to any organization using the specified versions of IBM API Connect.

Recommendation

  • Immediately apply patches or upgrade IBM API Connect to a version that remediates CVE-2026-3144 as per the vendor advisory https://www.ibm.com/support/pages/node/7278909.
  • Ensure all default credentials for IBM API Connect instances are changed to strong, unique passwords immediately upon deployment and configuration.
  • Implement robust monitoring for all authentication attempts, specifically looking for successful logins by default or newly created privileged accounts from unusual source IP addresses or locations within your webserver category logs.
  • Review access logs for the IBM API Connect management interface (from your webserver logs) for suspicious login patterns or unauthorized API manipulation attempts.