Description

IBM Db2 Mirror for i 7.4, 7.5, and 7.6 could allow a remote attacker to bypass authentication and obtain or alter sensitive information due to improper validation of request URI path segments.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "9.8",
  "pubDate": "2026-08-14T20:16:50.893Z",
  "pubdate": "2026-08-14T20:16:50.893Z",
  "executiveSummary": "An authentication bypass vulnerability has been identified in IBM Db2 Mirror for i versions 7.4, 7.5, and 7.6. The security flaw stems from improper validation of request URI path segments within the application logic, allowing a remote attacker to circumvent established authentication mechanisms. Successful exploitation of this vulnerability grants unauthorized access to restricted functionalities and data, enabling the acquisition or alteration of sensitive information residing within the affected database environments. The vulnerability poses a significant risk to data confidentiality and integrity, as it permits unauthenticated remote interaction with critical database mirroring services. Exploitation requires network connectivity to the vulnerable service, but no prior authentication or specialized privileges are mandated for the attacker. Organizations utilizing the affected IBM Db2 Mirror for i versions must apply official vendor-supplied patches and implement strict perimeter network controls to mitigate the exposure of vulnerable endpoints.",
  "technicalDetails": "The vulnerability resides in the request processing and URI parsing logic of IBM Db2 Mirror for i versions 7.4, 7.5, and 7.6. The root cause of the security defect is the insufficient and improper validation of specific URI path segments submitted during inbound HTTP or network requests. When processing these requests, the affected component fails to adequately verify whether the incoming request path conforms to strict authorization boundaries, thereby allowing malicious inputs to bypass the authentication gatekeeper.\nThe attack vector is network-based, enabling a remote attacker to interact directly with the vulnerable service without requiring prior authentication credentials or low-level system privileges. An attacker initiates exploitation by crafting a specially manipulated network request containing targeted anomalies within the URI path segments. These manipulated path segments are designed to deceive the request parser into misinterpreting the routing context, causing the application to treat the unauthenticated session as authorized.\nDuring the attack flow, the malicious URI payload is transmitted over the network to the listening service endpoint of IBM Db2 Mirror for i. The vulnerable component processes the malformed URI path without enforcing the mandatory security checks. Because the input validation logic is flawed, the request bypasses authentication controls and gains access to internal application routing handlers. Consequently, the attacker can execute unauthorized API calls or interact with administrative interfaces that are normally restricted.\nThe post-exploitation impact includes the unauthorized disclosure of sensitive data, configuration tampering, and the potential alteration of critical database mirroring information. The execution of arbitrary requests without authentication compromises the fundamental security posture of the deployment, threatening both data integrity and system confidentiality. Remediation requires addressing the improper URI validation logic at the source code level through official vendor updates."
}