{"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"],"slug":"CVE-2026-61788","body":"## Overview\n\nDBHub 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-61788)\n\nAffected packages:\n\n- `@bytebase/dbhub < 0.22.6`\n\nPatched in:\n\n- `@bytebase/dbhub 0.22.6`\n\nSource: https://github.com/advisories/GHSA-mwwr-p57h-56pf","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":40.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}