CVE-2026-7728Public exploitNetwork attack vector

Arbitrary file read and write via path traversal

Published May 4, 2026 · Updated May 4, 2026

Path traversal in Ryan Joachim MCP-RTFM 0.1.0 allows remote authenticated users to read or modify process-accessible files. The get_doc_content, read_doc, and update_doc tools interpolate the untrusted docFile value beneath .handoff_docs without normalization or a resolved-path boundary check. Exploitation requires access to invoke the MCP tools; reads are limited by process permissions, and writes additionally require matching existing content.

CVSS severity6.3
Medium
EPSS probability0.29%
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 Ryan Joachim MCP-RTFM 0.1.0 allows remote authenticated users to read or modify process-accessible files. The get_doc_content, read_doc, and update_doc tools interpolate the untrusted docFile value beneath .handoff_docs without normalization or a resolved-path boundary check. Exploitation requires access to invoke the MCP tools; reads are limited by process permissions, and writes additionally require matching existing content.

The record

CVE
CVE-2026-7728
Published
May 4, 2026
Updated
May 4, 2026
Vendor
Ryan Joachim
Product
MCP-RTFM
Classifications
CWE-22, T1565.001, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 4, 2026CVE publishedPublication date reported by the CVE source.
  2. May 4, 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=0.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Ryan Joachim · MCP-RTFMversion=0.1.0

Published CVSS scores

2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1565.001Stored Data Manipulation
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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