CVE-2026-48017: DbGate Code Injection Vulnerability – Authentication Bypass to RCE

Technical summary

The POST /runners/load-reader endpoint in DbGate versions 7.1.8 and earlier directly interpolates the functionName parameter into a JavaScript code template without input validation or sanitization. This code-generation pattern, combined with insufficient sandboxing (require=null), permits code injection that executes within the Node.js runtime context. An authenticated attacker can break out of the intended execution scope and execute arbitrary code with the full privileges of the Node.js process. The vulnerability is classified as CWE-94 (Improper Control of Generation of Code). Version 7.1.9 introduces patching controls.

Business impact

Compromise of a DbGate instance can lead to full data exfiltration from connected databases, lateral movement through stored credentials, unauthorized command execution on the hosting infrastructure, and persistent compromise of systems that rely on DbGate for database access and management. In cloud and containerized environments, this typically escalates to container root access, enabling further attacks on the host or other containers. Organizations using DbGate in multi-tenant or shared infrastructure scenarios face elevated risk of cross-tenant data leakage and loss of audit integrity.

Affected systems

DbGate versions 7.1.8 and prior are vulnerable. Version 7.1.9 contains the patch. The vulnerability affects all installations regardless of operating system (DbGate is cross-platform). Any DbGate deployment where database users, developers, or administrative staff can authenticate represents an attack surface.

Exploitability

Exploitability is moderate to high. An attacker must possess valid authentication credentials (no special permissions required), which may already exist within an organization or may be obtained through credential compromise. Once authenticated, crafting a malicious payload is straightforward—the attacker simply injects JavaScript into the functionName parameter. No user interaction is required, and the attack can be automated. The low barrier to entry and direct access to process-level execution make this a practical post-authentication privilege escalation vector.

Remediation

Upgrade DbGate to version 7.1.9 or later immediately. Organizations unable to upgrade urgently should restrict network access to DbGate endpoints to trusted internal networks, enforce strong authentication controls, monitor for suspicious POST requests to /runners/load-reader, and review logs for evidence of exploitation (look for unusual JavaScript payloads or OS command execution from DbGate processes).

Patch guidance

Upgrade to DbGate version 7.1.9 or later as soon as possible. Review vendor release notes and advisory documentation to confirm patch applicability and any required configuration changes. Test the patch in a non-production environment before deploying to critical systems. If version 7.1.9 is unavailable or cannot be deployed immediately, apply compensating controls: restrict API access via firewall rules, implement strict authentication policies, and disable the /runners/load-reader endpoint if it is not essential to operations.

Detection guidance

Search logs for POST requests to /runners/load-reader with suspicious or malformed functionName parameters. Look for JavaScript code fragments (eval, require, exec) in request payloads. Monitor Node.js process activity for unexpected child process spawning, file I/O, or outbound connections originating from DbGate. Examine audit trails for database access via credentials that were not explicitly provided by the user. In containerized environments, monitor for privilege escalation or host-level command execution initiated from the DbGate container.

Why prioritize this

This vulnerability should be prioritized urgently because it requires only basic authentication (not administrative privileges), allows complete system compromise on the host or container, and affects database infrastructure that is typically central to organizational operations. The attack path is straightforward and requires no user interaction. Any DbGate instance exposed to untrusted users or with weak credential hygiene is at immediate risk.

Risk score, explained

The CVSS 3.1 score of 8.8 (HIGH) reflects a network-accessible vulnerability (AV:N) requiring only user-level privileges (PR:L), with high confidentiality, integrity, and availability impact (C:H/I:H/A:H). The score appropriately captures the severity of post-authentication code execution that grants process-level access. The lack of complexity (AC:L) and the requirement for only basic authentication justify the elevated score.

Frequently asked questions