CVE-2026-82871 in ToolJet
Summary
by MITRE • 08/31/2026
ToolJet before v3.16.208 fails to validate organization membership in database read routes, allowing any authenticated user to access other organizations' table schemas and row data. Attackers can supply arbitrary organization IDs in URL parameters to list tables, retrieve column definitions, and execute join queries to read actual stored data from victim organizations.
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Analysis
by VulDB Data Team • 08/31/2026
The vulnerability identified in ToolJet versions prior to 3.16.208 represents a critical failure in server-side access control mechanisms, specifically within the database read routes of the application architecture. This flaw stems from an insufficient validation of organization membership when processing requests that interact with stored data. In a properly secured multi-tenant environment, every request targeting organizational resources must be rigorously verified against the user's assigned permissions and tenant boundaries to ensure strict isolation between different organizations sharing the same infrastructure. However, in this instance, the application logic fails to cross-reference the organization identifier provided by the client with the authenticated user's actual membership records within that specific organization. This oversight creates a direct path for unauthorized data access, fundamentally breaking the trust boundary established during authentication and session management phases.
The technical execution of this vulnerability relies on an insecure direct object reference pattern where attackers can manipulate URL parameters or request payloads to supply arbitrary organization identifiers. By substituting their own valid organization ID with that of a victim organization, authenticated users can bypass intended access controls. The application processes these requests without verifying whether the requesting user has legitimate membership rights within the target organization's context. This allows an attacker to enumerate table schemas and retrieve column definitions for databases belonging to other tenants. Furthermore, because the vulnerability extends to data retrieval operations, attackers are not limited to metadata extraction but can execute join queries against actual stored records. This capability transforms a simple information disclosure issue into a severe confidentiality breach, enabling the exfiltration of sensitive business logic, customer personal identifiable information, and proprietary operational data from victim organizations.
From an industry standard perspective, this vulnerability aligns with CWE-639, which describes authorization bypass through redirection to an unauthorized URL or resource identifier. It also closely mirrors CWE-284, indicating improper access control where the application fails to enforce proper restrictions on authenticated users regarding specific resources. In terms of offensive security frameworks such as MITRE ATT&CK, this behavior is characteristic of T1078, Valid Accounts, specifically when leveraged for lateral movement or data exfiltration within a multi-tenant SaaS environment. The ability to read arbitrary organization data falls under the technique of Data from Information Repositories, where attackers exploit misconfigured access controls to harvest valuable datasets without needing elevated privileges or initial system compromise beyond basic authentication.
The operational impact of this flaw is severe for any enterprise utilizing ToolJet as a low-code development platform with multiple distinct organizational units. Since organizations often contain sensitive data ranging from financial records to intellectual property, the ability for one authenticated user to access another's entire database schema and contents poses significant risks including regulatory non-compliance with standards like GDPR or HIPAA, loss of competitive advantage due to trade secret leakage, and potential reputational damage resulting from public exposure of private customer information. The lack of isolation means that a single compromised account can serve as a pivot point for accessing the data assets of numerous other organizations hosted on the same instance, amplifying the blast radius of any individual credential compromise.
To mitigate this vulnerability, immediate action is required to upgrade ToolJet installations to version 3.16.208 or later, where these access control checks have been implemented and validated. For environments that cannot be immediately patched, administrators should implement strict network-level controls such as web application firewalls configured to detect anomalous patterns in organization ID parameters, although this is a less reliable defense than fixing the root cause. Additionally, organizations should review their internal security policies regarding multi-tenant isolation and ensure that all API endpoints are subjected to rigorous authorization testing during development cycles. Regular penetration testing focusing on broken object level permissions will help identify similar flaws before they can be exploited in production environments.