Description

IBM Db2 Mirror for i 7.4, 7.5, and 7.6 could allow a remote authenticated attacker to bypass security restrictions due to the ability to disable server-side input validation via a request parameter.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "6.3",
  "pubDate": "2026-08-14T20:16:50.060Z",
  "pubdate": "2026-08-14T20:16:50.060Z",
  "executiveSummary": "A security restriction bypass vulnerability exists within IBM Db2 Mirror for i versions 7.4, 7.5, and 7.6. This flaw allows a remote authenticated attacker to effectively disable server-side input validation mechanisms by manipulating a specific request parameter.\nThe primary impact of this vulnerability is the circumvention of established security controls, potentially leading to unauthorized data manipulation or anomalous system behavior. The affected systems are instances of IBM Db2 Mirror for i utilizing the vulnerable request handling components.\nThe risk implication centers on the degradation of data integrity and boundary enforcement within the database mirroring architecture. An attacker requires remote authentication to the target system to exploit this vulnerability. Successful exploitation relies on the ability to inject or modify request parameters designed to toggle critical validation logic on the server side, allowing malicious or malformed inputs to bypass intended validation checks.",
  "technicalDetails": "The vulnerability resides in the request processing logic of IBM Db2 Mirror for i, specifically within the parameter parsing and validation subsystems of the affected database mirroring services. The root cause of the issue is improper input handling where server-side input validation can be overtly disabled or bypassed via an exposed request parameter.\nExploitation of this vulnerability requires the attacker to possess valid authentication credentials to interact with the target system over the network. The attack flow commences when the authenticated user crafts an HTTP or proprietary protocol request directed at the vulnerable Db2 Mirror service, incorporating the specific parameter designed to suppress server-side input validation.\nUpon receiving the payload, the vulnerable component processes the request parameter and incorrectly disables the routine input sanitization and boundary checks that would normally validate incoming data structures. By bypassing these security checks, the application accepts unvalidated or malformed data that could otherwise trigger errors or lead to downstream processing flaws. The affected versions include IBM Db2 Mirror for i 7.4, 7.5, and 7.6.\nThe privilege requirements are limited to remote authenticated access, meaning any user with standard valid credentials capable of communicating with the service can initiate the attack vector. Network exposure is inherent to services running the vulnerable Db2 Mirror functionality. Post-exploitation impact includes the potential circumvention of application-level security boundaries, subversion of data integrity controls, and the facilitation of further unauthorized interactions with the database mirroring environment due to the absence of proper input validation."
}