Description

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 attacker to bypass authentication and inject unauthorized configuration changes due to improper certificate validation.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "8.0",
  "pubDate": "2026-11-07T05:18:44.023Z",
  "pubdate": "2026-11-07T05:18:44.023Z",
  "executiveSummary": "This vulnerability involves an authentication bypass flaw in IBM API Connect, resulting from improper certificate validation protocols.\nThe vulnerability affects IBM API Connect versions 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2.\nBy failing to correctly validate certificates during the handshake or authentication process, the system permits unauthorized remote actors to circumvent established security controls.\nThe primary impact is the unauthorized injection of configuration changes, which compromises the integrity and availability of the API management environment.\nSuccessful exploitation allows an unauthenticated remote attacker to perform administrative actions, potentially leading to a total compromise of the API gateway configuration.\nThe risk is classified as high, as it enables malicious actors to modify critical API routing, security policies, or backend integration settings without requiring valid credentials.\nThere are no specific user interaction requirements, and the vulnerability is exploitable via the network, making it a significant concern for environments exposed to untrusted traffic.",
  "technicalDetails": "The root cause of this vulnerability lies in the improper implementation of X.509 certificate validation logic within the affected IBM API Connect versions. When establishing secure connections or validating client/server identities, the system fails to perform rigorous checks on the provided certificates, such as verifying the chain of trust, checking certificate revocation status, or confirming the identity bindings required for secure communication.\nThe vulnerability manifests as an authentication bypass mechanism. Under standard operating conditions, the gateway requires valid cryptographic proof of identity before permitting configuration changes. Due to the flaw, an attacker can present a malformed, self-signed, or otherwise untrusted certificate that the system erroneously accepts as valid.\nThe attack flow begins with the attacker initiating a connection to the management or configuration interface of the IBM API Connect appliance. By intercepting or crafting a communication sequence, the attacker bypasses the mandatory mutual TLS (mTLS) or certificate-based authentication checks. Because the underlying service relies on the flawed validation routine to grant administrative privileges, the attacker effectively assumes an authenticated state without a valid credential set.\nOnce the authentication barrier is circumvented, the attacker can interact with the API management layer to inject, modify, or delete configuration objects. This includes altering API definitions, endpoint configurations, security schemes, and backend routing rules. By injecting malicious configuration, an attacker can redirect traffic to unauthorized endpoints, extract sensitive data, or disable security monitoring functions.\nThis vulnerability is particularly severe because it targets the administrative control plane of the API management infrastructure. Since the API gateway is responsible for enforcing security policies for downstream services, compromising the gateway configuration grants the attacker control over the traffic flow of the entire ecosystem. The flaw resides within the certificate handling components responsible for securing administrative management interfaces. Given the remote accessibility of these interfaces, the attack vector is direct and does not require local access, making it highly attractive for attackers targeting enterprise API infrastructure."
}