Description

A holder of a valid integration credential may impersonate other users under specific conditions.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.2",
  "pubDate": "2026-08-12T16:17:16.887Z",
  "pubdate": "2026-08-12T16:17:16.887Z",
  "executiveSummary": "An authorization bypass vulnerability exists that allows a holder of a valid integration credential to impersonate arbitrary users under specific operational conditions. This security flaw poses significant risks to system integrity and user confidentiality by potentially granting unauthorized actors full access to victim user sessions, data, and functionalities.\nThe vulnerability affects systems utilizing integration credentials for inter-service communication or API access. The core risk implication is horizontal and vertical privilege escalation, enabling an authenticated entity with legitimate integration privileges to subvert access control boundaries and masquerade as other registered users within the application domain.\nAttacker capabilities are constrained by the requirement of initially possessing a valid integration credential. However, once this prerequisite is satisfied, the adversary can leverage the flaw to bypass underlying authorization checks during the credential-to-user mapping or session initiation phase.\nExploitation requirements strictly necessitate the prior acquisition or control of a legitimate, active integration credential. The vulnerability highlights a failure in enforcing strict least-privilege principles and context validation within the credential handling mechanism, allowing service-level permissions to improperly bleed into user-level operational scopes without adequate cryptographic or logical constraints.",
  "technicalDetails": "The root cause of the vulnerability stems from improper authorization enforcement and flawed session context generation within the integration credential validation subsystem. When an external entity presents a valid integration credential, the application logic fails to properly restrict the operational context of the resulting session, allowing the bearer to arbitrarily specify or imply target user identifiers without validating whether the integration credential holds explicit authorization to act on behalf of the targeted user.\nThe attack flow proceeds in a sequential manner. First, the adversary obtains a valid integration credential through legitimate provisioning, configuration leakage, or prior compromise of service-level secrets. Second, the adversary crafts an API request or authentication sequence utilizing the integration credential while injecting parameters that designate a specific victim user's identifier within the request payload, headers, or token claims.\nUpon receipt of the request, the vulnerable component processes the integration credential and authenticates the service tier. However, due to the absence of rigorous context bounding, the access control layer incorrectly infers that the administrative or service-level privileges granted to the integration credential extend to the user impersonation request. The application subsequently binds the active session or executes the requested transaction in the security context of the targeted victim user rather than the calling integration entity.\nThe vulnerable component resides in the authentication and authorization middleware responsible for mapping service integration tokens to internal user contexts. The exploitation vector is typically exposed via network-accessible APIs or integration endpoints that accept programmatic requests. The post-exploitation impact includes unauthorized data exfiltration, modification of victim user profiles, execution of state-changing transactions on behalf of the victim, and potential persistence if the integration credential remains valid and unrevoked."
}