CVE-2025-56404Public exploitNetwork attack vector

Unauthenticated database disclosure via unprotected SSE endpoint

Published Sep 10, 2025 · Updated Sep 10, 2025

Missing authentication in MariaDB MCP 0.1.0 allows remote attackers to read database information through the SSE service. The SSE transport in server.py accepts unauthenticated network connections and exposes MCP tools that query the configured database. Exploitation requires SSE mode to be reachable beyond localhost; no account or user interaction is required, and the reported consequence is read-only disclosure.

CVSS severity7.5
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in MariaDB MCP 0.1.0 allows remote attackers to read database information through the SSE service. The SSE transport in server.py accepts unauthenticated network connections and exposes MCP tools that query the configured database. Exploitation requires SSE mode to be reachable beyond localhost; no account or user interaction is required, and the reported consequence is read-only disclosure.

The record

CVE
CVE-2025-56404
Published
Sep 10, 2025
Updated
Sep 10, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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