CVE-2026-101069: dbgate Path Traversal Vulnerability

CVE-2026-101069 Overview

CVE-2026-101069 is a path traversal vulnerability [CWE-22] in the open-source database management tool dbgate, affecting versions up to 7.3.1. The flaw resides in the exportModelSql function within packages/api/src/controllers/databaseConnections.js, part of the Export Handler component. An attacker can manipulate the outputFile argument to write SQL export output to arbitrary locations on the host file system. The attack is executable remotely without authentication, and a public exploit has been released. According to the disclosure, the vendor was contacted but did not respond.

Critical Impact

Remote attackers can abuse the outputFile parameter to write files outside the intended export directory, enabling arbitrary file write on hosts running dbgate ≤ 7.3.1.

Affected Products

• dbgate versions up to and including 7.3.1
• Component: Export Handler (packages/api/src/controllers/databaseConnections.js)
• Function: exportModelSql

Discovery Timeline

• 2026-09-28 - CVE-2026-101069 published to the National Vulnerability Database (NVD)
• 2026-09-28 - Last updated in NVD database
• 2026-09-29 - EPSS score published

Technical Details for CVE-2026-101069

Vulnerability Analysis

The vulnerability is a classic path traversal issue in dbgate's SQL model export feature. The exportModelSql function accepts a user-controlled outputFile argument and uses it to determine where exported SQL content is written. Because the function does not canonicalize the supplied path or constrain it to a safe base directory, an attacker can supply traversal sequences such as ../ or an absolute path to write files outside the intended export location.

Since dbgate exposes an HTTP API, the function can be reached over the network. The impact depends on the privileges of the dbgate process: an attacker may overwrite configuration files, drop scripts into web-accessible directories, or stage files that lead to code execution on the host.

Root Cause

The root cause is missing input validation and path normalization on the outputFile parameter inside exportModelSql. The handler trusts caller-supplied file paths without enforcing an allow-listed export directory or rejecting traversal sequences, which maps directly to CWE-22 (Improper Limitation of a Pathname to a Restricted Directory).

Attack Vector

The attack vector is network-based with low attack complexity and no privileges or user interaction required. An attacker sends a crafted request to the dbgate API endpoint that invokes exportModelSql, substituting a traversal path in outputFile. The server writes the generated SQL export to the attacker-chosen location, producing an arbitrary file write primitive. Technical details and a proof-of-concept walkthrough are available in the public CVE documentation on GitHub and in the VulDB entry for CVE-2026-101069.

Detection Methods for CVE-2026-101069

Indicators of Compromise

• Unexpected files appearing outside the configured dbgate export directory, especially with .sql content or attacker-controlled names.
• HTTP requests to dbgate API endpoints containing outputFile parameters with traversal sequences such as ../, ..\, or absolute paths like /etc/, /var/www/, or C:\.
• Modifications to sensitive files (web roots, cron directories, startup scripts) correlated in time with dbgate process activity.

Detection Strategies

• Inspect dbgate API request logs for the exportModelSql operation and flag any outputFile value containing .., URL-encoded traversal (%2e%2e), or absolute paths outside the designated export folder.
• Deploy file integrity monitoring on directories that should never be written to by the dbgate service account.
• Correlate process activity from the dbgate Node.js process with file writes to unexpected paths using endpoint telemetry.

Monitoring Recommendations

• Enable verbose request logging on reverse proxies in front of dbgate and alert on parameter patterns matching path traversal.
• Monitor the dbgate service account for writes outside its working directory using OS auditing (auditd on Linux, Sysmon on Windows).
• Track outbound and inbound exposure of the dbgate web interface and alert when it becomes reachable from untrusted networks.

How to Mitigate CVE-2026-101069

Immediate Actions Required

• Restrict network exposure of dbgate to trusted administrators only, using firewall rules, VPN, or reverse-proxy authentication.
• Enforce authentication on the dbgate instance and disable any anonymous access to API endpoints.
• Run the dbgate process under a low-privilege account with write access limited to its export directory.
• Audit the host for unexpected file writes that match the IOC patterns listed above.

Patch Information

At the time of publication, no vendor-supplied patch is referenced in the NVD entry for CVE-2026-101069, and the disclosure notes that the vendor did not respond to the initial contact. Monitor the dbgate project repository for a fixed release above 7.3.1 and review the VulDB vulnerability entry 410927 for updated remediation status.

Workarounds

• Block or filter requests to the exportModelSql endpoint at a reverse proxy or Web Application Firewall (WAF) when outputFile contains .., backslashes, or absolute path markers.
• Place dbgate behind an authenticated reverse proxy and restrict access to a management VLAN until a patched version is released.
• Run dbgate inside a container with a read-only root filesystem and only the export directory mounted as writable, limiting the blast radius of arbitrary writes.

# Example nginx snippet to block traversal patterns in outputFile
location /api/ {
    if ($args ~* "outputFile=[^&]*(\.\.|%2e%2e|/etc/|/var/|/root/)") {
        return 403;
    }
    proxy_pass http://127.0.0.1:3000;
}