CVE-2026-11720Network attack vector

Unauthenticated credentialed endpoint access via path traversal

Published Jun 29, 2026 · Updated Jun 29, 2026

Path traversal in Google MCP Toolbox for Databases before 1.3.0 allows remote attackers to access unintended same-host API endpoints. The HTTP tool URL builder substitutes untrusted pathParams before ResolveReference normalizes dot segments, allowing the resolved path to escape its configured base scope. Exploitation requires a reachable HTTP tool with an attacker-controlled path parameter; successful requests carry the Toolbox-configured credentials and can read or alter resources exposed by unintended endpoints.

CVSS severity9.3
Critical
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Google MCP Toolbox for Databases before 1.3.0 allows remote attackers to access unintended same-host API endpoints. The HTTP tool URL builder substitutes untrusted pathParams before ResolveReference normalizes dot segments, allowing the resolved path to escape its configured base scope. Exploitation requires a reachable HTTP tool with an attacker-controlled path parameter; successful requests carry the Toolbox-configured credentials and can read or alter resources exposed by unintended endpoints.

The record

CVE
CVE-2026-11720
Published
Jun 29, 2026
Updated
Jun 29, 2026
Vendor
Go standard library
Product
MCP Toolbox for Databases
Classifications
CWE-22, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · MCP Toolbox for Databasesversion=0 <1.3.0

Published CVSS scores

9.3Google Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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