CVE-2026-7384Public exploitNetwork attack vector

Arbitrary file write via unsanitized topic path

Published Apr 29, 2026 · Updated Apr 29, 2026

Path traversal in ezequiroga mcp-bases allows remote attackers to write papers_info.json files outside the intended papers directory. The search_papers tool lowercases topic and replaces spaces, then passes the untrusted value to os.path.join and os.makedirs without canonicalization or a containment check. Any untrusted caller able to invoke the MCP tool can use ../ traversal to create directories and write or overwrite papers_info.json wherever the server account has permission.

CVSS severity7.3
High
EPSS probability0.42%
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 ezequiroga mcp-bases allows remote attackers to write papers_info.json files outside the intended papers directory. The search_papers tool lowercases topic and replaces spaces, then passes the untrusted value to os.path.join and os.makedirs without canonicalization or a containment check. Any untrusted caller able to invoke the MCP tool can use ../ traversal to create directories and write or overwrite papers_info.json wherever the server account has permission.

The record

CVE
CVE-2026-7384
Published
Apr 29, 2026
Updated
Apr 29, 2026
Vendor
ezequiroga
Product
mcp-bases
Classifications
CWE-22, T1565.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 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=357ca19c7a49a9b9cb2ef639b366f03aba8bea39
  2. Affected versionversion=c630b8ab0f970614d42da8e566e9c0d15a16414c

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ezequiroga · mcp-basesversion=357ca19c7a49a9b9cb2ef639b366f03aba8bea39; version=c630b8ab0f970614d42da8e566e9c0d15a16414c

Published CVSS scores

7.5INCIBE-CERTAV:N/AC:L/Au:N/C:P/I:P/A:P
7.3INCIBE-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
5.5INCIBE-CERTCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E: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.

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 exploitPublished

Weakness, pattern, technique

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

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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