CVE-2026-81819 in Flowintel
Summary
by MITRE • 08/27/2026
Affected versions of Flowintel expose the /my_assignment/user API endpoint to any authenticated API user. The endpoint accepts a user_id parameter identifying the user whose assignments should be returned, but previously had no role restriction beyond general API authentication.
As a result, a lower-privileged authenticated user could potentially query another user’s assignment information by supplying that user’s identifier.
The fix changes:
method_decorators = [api_required]
to:
method_decorators = [admin_or_org_admin_required, api_required]
so only administrators or organization administrators can perform cross-user assignment queries.
Version impacted =>3.3.0
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Analysis
by VulDB Data Team • 08/27/2026
Flowintel versions 3.3.0 and above contain a critical access control vulnerability within the /my_assignment/user API endpoint that allows authenticated users to bypass intended role-based restrictions. This flaw represents an Insecure Direct Object Reference, commonly categorized under CWE-639 in industry standards for software security weaknesses. The specific technical failure lies in the implementation of method decorators which previously relied solely on a general api_required check. This configuration ensured that any user possessing valid API credentials could access the endpoint but failed to validate whether the requesting user possessed sufficient privileges to query data belonging to other entities within the system. Consequently, the application logic did not enforce proper authorization checks relative to the resource being accessed, specifically the assignment records of different users identified by the supplied user_id parameter.
The operational impact of this vulnerability is significant for organizations relying on Flowintel for managing assignments and workflows. An attacker with a low-privileged authenticated account can exploit this flaw to enumerate or retrieve sensitive information associated with other users in the system. By simply modifying the user_id parameter in API requests, an adversary can bypass administrative controls and access private assignment data intended exclusively for higher-level administrators or organization admins. This breach of confidentiality undermines the principle of least privilege and exposes internal operational details that could be leveraged for further attacks such as social engineering, targeted phishing, or deeper reconnaissance within the network environment. The vulnerability aligns with MITRE ATT&CK technique T1078, Valid Accounts, specifically regarding lateral movement through legitimate credentials to access restricted resources without elevated privileges.
The remediation implemented in subsequent versions addresses this issue by modifying the method decorators associated with the affected endpoint. The original configuration requiring only api_required has been replaced with a stricter requirement of admin_or_org_admin_required combined with api_required. This change ensures that before any cross-user assignment query is processed, the system verifies that the authenticated user holds either administrator or organization administrator privileges. By enforcing this role-based access control check at the API layer, Flowintel effectively prevents lower-privileged users from querying data outside their authorized scope. Organizations running affected versions should immediately upgrade to a patched release where these authorization checks are enforced. Additionally, it is recommended to audit existing logs for any suspicious patterns of user_id parameter manipulation that may indicate exploitation attempts prior to patching.