CVE-2026-59971

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Source

https://cve.org/CVERecord?id=CVE-2026-59971

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59971.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-59971

Aliases

Published

2026-09-15T14:10:28Z

Modified

2026-10-02T03:30:42Z

Severity

10.0 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H CVSS Calculator

Summary

MySQL MCP Server: Missing Origin/Host Validation in SSE Transport Enables Unauthenticated SQL Execution (DNS Rebinding / Direct Exposure)

Details

MySQL MCP Server is a Model Context Protocol server that enables secure interaction with MySQL databases. Prior to 0.4.2, setting MCP_TRANSPORT=sse causes src/mysql_mcp_server/server.py to construct SseServerTransport without security_settings or enable_dns_rebinding_protection, while the Starlette routes /, /sse, and /messages/ have no authentication and the service binds to 0.0.0.0 by default. A network attacker can directly reach execute_sql, or can use DNS rebinding to make a victim's browser relay same-origin requests to a locally bound service, and supply a query that reaches cursor.execute(query). This allows unauthenticated disclosure and modification of the configured database; when the MySQL account has FILE privileges, the same access can read or write server files and may enable code execution. The default stdio transport is not affected. This issue is fixed in 0.4.2.

Database specific

{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-306",
        "CWE-346"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59971.json"
}

References

Affected packages

Git / github.com/designcomputer/mysql_mcp_server

Affected ranges

Type

GIT

Repo

https://github.com/designcomputer/mysql_mcp_server

Events

Introduced

Fixed

a96549f4a4d65443fd6e9c7f2324fba9a5c80a82

Fixed

e25be7fc4e9e79d7efc52eb69d776129429a837f

Database specific

Show details

{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "0.4.2"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v0.*

v0.1.0

v0.1.1

v0.1.2

v0.2.0

v0.2.1

v0.2.2

v0.3.0

v0.3.1

v0.4.0

v0.4.1

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59971.json"