CVE-2026-32821 in dataCycle
Summary
by MITRE • 07/20/2026
dataCycle is a data management system for centrally storing, managing, searching, finding, and distributing data. In dataCycle-CORE, the module handling core processing and framework rules, before and including version 25.07.3, any authenticated API user who has their own access token can ask the collection API to evaluate permissions as a different user by supplying `user_email`. If the target user has collections, this can expose those collections through the API. In V4, once a collection id is known, the same controller also offers `add_item` and `remove_item` routes without any object-level `authorize!` checks, creating a likely cross-user modification path. This is patched in version 26.06.08.
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Analysis
by VulDB Data Team • 07/20/2026
The dataCycle-CORE system presents a critical authorization vulnerability that undermines the fundamental security boundaries between users within its data management framework. This flaw exists in versions prior to 26.06.08 and specifically affects the collection API functionality where authenticated users can manipulate permissions through the user_email parameter. The vulnerability stems from improper access control validation mechanisms that fail to enforce proper authorization checks when processing requests for different user contexts, creating a privilege escalation vector that allows unauthorized data exposure.
The technical implementation of this vulnerability manifests through two distinct attack vectors that compound the security risk. First, the collection API accepts user_email parameters that bypass normal permission verification, enabling authenticated users to request collection data belonging to other users simply by knowing their email addresses. This represents a classic case of insufficient authorization checks as defined by CWE-285, where the system fails to properly validate that the requesting user has legitimate access rights to the target user's resources. Second, in version 4 of the framework, the same controller exposes add_item and remove_item endpoints without object-level authorization verification, creating a pathway for cross-user data modification that directly violates the principle of least privilege enforcement.
The operational impact of this vulnerability extends beyond simple data exposure to encompass potential data integrity compromise and unauthorized user impersonation. Attackers can leverage this flaw to enumerate collections belonging to other users, potentially discovering sensitive datasets through systematic enumeration of email addresses. The addition of cross-user modification capabilities creates a scenario where malicious actors could alter or delete data belonging to other users without proper authorization, fundamentally compromising the system's data integrity and user isolation guarantees. This vulnerability directly aligns with ATT&CK technique T1078.004 for valid accounts and T1566.001 for credential access through privilege escalation.
The root cause of this issue lies in the absence of proper authorization boundaries within the API controller implementation, where session-based user context is not consistently enforced across all operations. The system fails to maintain proper authentication state validation when processing requests that should be scoped to specific user contexts, creating a gap between the intended access control model and actual implementation. This represents a failure in the security architecture that allows for privilege escalation through API parameter manipulation, effectively bypassing the system's core access control mechanisms.
Mitigation strategies should focus on implementing comprehensive authorization checks at every API endpoint, ensuring that all operations verify both authentication status and proper user permissions before executing any data manipulation functions. The system must enforce strict object-level authorization controls for all collection operations, particularly those involving add_item and remove_item functions that were identified as vulnerable in the V4 implementation. Security patches should include mandatory validation of user context through session tokens rather than accepting external user identifiers, alongside comprehensive logging and monitoring of access patterns to detect potential abuse attempts. Regular security testing should verify that authorization boundaries remain intact across all system components and that proper separation of duties is maintained between different user roles within the dataCycle framework.