CVE-2026-61788

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Source

https://cve.org/CVERecord?id=CVE-2026-61788

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-61788.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-61788

Aliases

GHSA-mwwr-p57h-56pf

Published

2026-09-24T17:37:40Z

Modified

2026-09-25T03:48:35Z

Severity

7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator

Summary

@bytebase/dbhub's read-only mode does not prevent database writes

Details

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.

Database specific

{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-184",
        "CWE-636",
        "CWE-863"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61788.json"
}

References

Affected packages

Git / github.com/bytebase/dbhub

Affected ranges

Type

GIT

Repo

https://github.com/bytebase/dbhub

Events

Introduced

Fixed

6647caa4bfc6c197731d88ee0ebd7baeb846d1c0

Database specific

Show details

{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "0.22.6"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-61788.json"