CVE-2025-53110Public exploitNetwork attack vector

Unintended file access via colliding path prefixes

Published Jul 2, 2025 · Updated Jul 2, 2025

Path traversal in Filesystem in Model Context Protocol Servers before 0.6.4 or 2025.7.01 allows remote attackers to access unintended files. The validatePath function used String.startsWith against each normalized allowed-directory string, so a sibling such as /safe_backup passed when /safe was allowed. Exploitation requires an MCP client to submit a file-tool request for an existing colliding-prefix path; reads or writes then occur with the server process permissions.

CVSS severity7.3
High
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 Filesystem in Model Context Protocol Servers before 0.6.4 or 2025.7.01 allows remote attackers to access unintended files. The validatePath function used String.startsWith against each normalized allowed-directory string, so a sibling such as /safe_backup passed when /safe was allowed. Exploitation requires an MCP client to submit a file-tool request for an existing colliding-prefix path; reads or writes then occur with the server process permissions.

The record

CVE
CVE-2025-53110
Published
Jul 2, 2025
Updated
Jul 2, 2025
Vendor
Model Context Protocol
Product
Model Context Protocol Servers
Classifications
CWE-22, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 2, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 2, 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?

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

  1. Affected versionversion=< 0.6.4
  2. Affected versionversion=< 2025.7.01

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Model Context Protocol · Model Context Protocol Serversversion=< 0.6.4; version=< 2025.7.01

Published CVSS scores

7.3GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:H/SI:H/SA:H

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-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System

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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