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 improper authorization using user-supplied input.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "8.8",
  "pubDate": "2026-08-14T20:16:49.700Z",
  "pubdate": "2026-08-14T20:16:49.700Z",
  "executiveSummary": "An authorization bypass vulnerability exists in IBM Db2 Mirror for i versions 7.4, 7.5, and 7.6 that could allow a remote authenticated attacker to circumvent established security restrictions. The flaw stems from improper authorization validation when processing user-supplied input within the affected system. Successful exploitation of this security defect permits unauthorized access to restricted functionalities or data, undermining the integrity and confidentiality boundaries enforced by the access control architecture. The risk implication centers on privilege escalation and unauthorized operational capability within the database mirroring environment. Exploitation prerequisites require the attacker to possess remote authentication credentials to access the target system, after which they can supply malicious input designed to subvert the authorization enforcement mechanism. No specific complex interaction or elevated administrative privileges are explicitly required beyond initial authentication, making valid credential abuse a primary vector for initiating the attack flow.",
  "technicalDetails": "The vulnerability resides in the authorization validation logic of IBM Db2 Mirror for i versions 7.4, 7.5, and 7.6. The root cause is categorized as an improper authorization flaw resulting from the unsafe handling and evaluation of user-supplied input during security restriction checks. The affected component processes incoming requests containing parameters that dictate operational boundaries and access permissions.\nThe attack flow begins when a remote authenticated adversary interacts with the vulnerable Db2 Mirror service over the network. By crafting specialized requests containing manipulated user-supplied input, the attacker targets the authorization subsystem. Because the application fails to adequately sanitize, validate, or contextually verify the supplied parameters against the security context, the authorization engine incorrectly concludes that the request complies with access policies.\nThis logic flaw allows the execution of operations or access to resources that should normally be blocked by the security architecture. Post-exploitation impact includes the potential bypass of security controls, unauthorized execution of database mirroring commands, and potential data exposure depending on the specific restricted functionalities accessed during the session. Authentication is a prerequisite, as the attacker must establish a valid authenticated session to supply the malicious input to the vulnerable interfaces. Network exposure is implied by the remote nature of the attack vector, permitting exploitation over the network interface exposed by the Db2 Mirror service."
}