CVE-2026-42463: SQLBot Authorization Bypass Vulnerability

CVE-2026-42463 Overview

CVE-2026-42463 is an Insecure Direct Object Reference (IDOR) and authorization bypass vulnerability in SQLBot, an intelligent Text-to-SQL system built on large language models and Retrieval-Augmented Generation (RAG). The flaw affects versions prior to 1.8.0 and resides in the /api/v1/datasource/exportDsSchema and /api/v1/datasource/uploadDsSchema endpoints. Authenticated attackers can read and modify database schemas and data sources belonging to other tenants or workspaces. The vulnerability is tracked under [CWE-639] (Authorization Bypass Through User-Controlled Key) and is fixed in SQLBot 1.8.0.

Critical Impact

Any authenticated tenant can access and tamper with other tenants' database schemas and data source configurations, breaking workspace isolation in a multi-tenant deployment.

Affected Products

• SQLBot versions prior to 1.8.0
• SQLBot /api/v1/datasource/exportDsSchema endpoint
• SQLBot /api/v1/datasource/uploadDsSchema endpoint

Discovery Timeline

• 2026-05-13 - CVE-2026-42463 published to NVD
• 2026-05-13 - Last updated in NVD database

Technical Details for CVE-2026-42463

Vulnerability Analysis

SQLBot exposes two data source management endpoints that accept user-controlled identifiers referencing data source or schema objects. The application authenticates the caller but does not verify that the referenced object belongs to the caller's tenant or workspace. As a result, a low-privileged authenticated user in one workspace can supply identifiers belonging to another workspace and have the server return or overwrite that data.

The exportDsSchema endpoint discloses sensitive schema metadata across tenant boundaries. The uploadDsSchema endpoint allows write operations that modify the target tenant's data source definitions. Both behaviors break the workspace isolation guarantees expected from a multi-tenant SaaS application.

Root Cause

The root cause is missing object-level authorization on tenant-scoped resources. The endpoints trust the object identifier supplied in the request rather than enforcing a server-side check that the identifier maps to a resource owned by the authenticated session's workspace. This is the classic IDOR pattern captured by [CWE-639].

Attack Vector

Exploitation requires a valid authenticated session on the SQLBot instance and network access to the API. An attacker enumerates or guesses data source identifiers from other workspaces and issues requests to /api/v1/datasource/exportDsSchema to read schemas or /api/v1/datasource/uploadDsSchema to overwrite them. No user interaction or elevated privileges are needed. Refer to the GitHub Security Advisory for vendor-confirmed technical details.

Detection Methods for CVE-2026-42463

Indicators of Compromise

• Requests to /api/v1/datasource/exportDsSchema or /api/v1/datasource/uploadDsSchema containing data source identifiers that do not belong to the calling user's workspace.
• Unexpected schema modifications or new data source entries appearing in tenant workspaces without a corresponding administrative action.
• Bursts of sequential or enumerated datasource ID values from a single authenticated session.

Detection Strategies

• Correlate API request logs with the authenticated user's workspace ID and flag requests where the target object ID resolves to a different workspace.
• Alert on high-rate access to exportDsSchema from a single account, which suggests enumeration.
• Audit database change logs for schema or data source modifications that do not match the originating user's tenant scope.

Monitoring Recommendations

• Enable verbose API access logging on the SQLBot application tier, including authenticated user, workspace ID, target object ID, and response size.
• Forward SQLBot application logs to a centralized analytics platform and build queries to detect cross-workspace object access patterns.
• Monitor for anomalous outbound data volumes from the exportDsSchema endpoint, which can indicate bulk schema exfiltration.

How to Mitigate CVE-2026-42463

Immediate Actions Required

• Upgrade all SQLBot deployments to version 1.8.0 or later, which contains the official fix.
• Rotate credentials and API tokens for any data source whose schema may have been exposed or modified.
• Review audit logs for the affected endpoints since deployment to identify any prior cross-workspace access.

Patch Information

The maintainers fixed the issue in SQLBot 1.8.0 by enforcing workspace-scoped authorization on the exportDsSchema and uploadDsSchema endpoints. See the GitHub Security Advisory GHSA-pq2r-fj48-xfpp for the upstream advisory and patch reference.

Workarounds

• Restrict network access to SQLBot API endpoints to trusted administrators until the upgrade is completed.
• Place a reverse proxy or API gateway in front of SQLBot that enforces per-tenant access control on /api/v1/datasource/* routes.
• Temporarily disable the affected exportDsSchema and uploadDsSchema routes at the gateway layer if upgrade is not immediately possible.

# Example NGINX rule to block the vulnerable endpoints until patched
location ~* ^/api/v1/datasource/(exportDsSchema|uploadDsSchema)$ {
    return 403;
}