---
id: CVE-2026-61788
title: >-
  DBHub is a database MCP server for Postgres, MySQL, SQL Server, Oracle,
  MariaDB, SQLite
summary: >-
  DBHub is a database MCP server for Postgres, MySQL, SQL Server, Oracle,
  MariaDB, SQLite. Prior to version 0.22.6, setting `readonly = true` on the
  `execute_sql` tool does not make the connection read-only. The connectors are
  written to s…
severity: high
cvss: 7.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-184
  - CWE-636
  - CWE-863
vendor: bytebase
product: dbhub
affected:
  - dbhub < 0.22.6
published: '2026-09-24'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T18:17:16.837'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-61788'
references:
  - url: 'https://github.com/bytebase/dbhub/security/advisories/GHSA-mwwr-p57h-56pf'
    label: security-advisories@github.com
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-61788'
  - url: 'https://github.com/bytebase/dbhub/pull/342'
  - url: >-
      https://github.com/bytebase/dbhub/commit/872bb338f7d31f6afe517a076ac3e3edafaaaf08
  - url: 'https://github.com/bytebase/dbhub/releases/tag/v0.22.6'
  - url: 'https://github.com/advisories/GHSA-mwwr-p57h-56pf'
tags:
  - nvd
  - cve.org
  - ghsa
  - npm
ingestedAt: '2026-09-24T17:48:30.402Z'
aliases:
  - GHSA-mwwr-p57h-56pf
ecosystem: npm
patched:
  - '@bytebase/dbhub 0.22.6'
epss: 0.00303
epssPercentile: 0.2058
---

## Overview

DBHub is a database MCP server for Postgres, MySQL, SQL Server, Oracle, MariaDB, SQLite. Prior to version 0.22.6, setting `readonly = true` on the `execute_sql` tool does not make the connection read-only. The connectors are written to set PostgreSQL `default_transaction_read_only=on` (and open SQLite in `readOnly` mode), but that code is gated on a config value that is never populated, so it never runs. The only thing left enforcing read-only is a classifier that inspects the first keyword of each statement. Any `SELECT` that writes or has side effects through a function call passes it. With an ordinary role this allows sequence tampering; with a privileged role it allows writing arbitrary files on the server (`lo_export`), reading arbitrary host files (`pg_read_file`), and remote code execution (`dblink` + `COPY ... TO PROGRAM`). The HTTP transport is unauthenticated and binds to `0.0.0.0` by default, so this is reachable by any network caller of `/mcp`. Version 0.22.6 patches the issue.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-61788)

Affected packages:

- `@bytebase/dbhub < 0.22.6`

Patched in:

- `@bytebase/dbhub 0.22.6`

Source: https://github.com/advisories/GHSA-mwwr-p57h-56pf