CVE-2026-19370

Local file read and write via unrestricted sessionPath

Published Aug 9, 2026 · Updated Aug 9, 2026

Path traversal in new-mcp 0.1.0 allows local users to read or write files through crafted geminithinking session paths. The geminithinking handler passes sessionPath directly to saveSession or loadSession, whose synchronous filesystem calls neither confine nor canonicalize the supplied path. An MCP caller with local access can read session-shaped JSON files or create and overwrite JSON files within the server process's permissions.

CVSS severity5.3
Medium
EPSS probability0.14%
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 new-mcp 0.1.0 allows local users to read or write files through crafted geminithinking session paths. The geminithinking handler passes sessionPath directly to saveSession or loadSession, whose synchronous filesystem calls neither confine nor canonicalize the supplied path. An MCP caller with local access can read session-shaped JSON files or create and overwrite JSON files within the server process's permissions.

The record

CVE
CVE-2026-19370
Published
Aug 9, 2026
Updated
Aug 9, 2026
Vendor
bartekke8it56w2
Product
new-mcp
Classifications
CWE-22, T1005, T1565.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 9, 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 vectorlocal
Required privilegesauthenticated

What is affected?

bartekke8it56w2 · new-mcpversion=0.1.0

Published CVSS scores

5.3VulDBCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
1.9VulDBCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
4.3VulDBAV:L/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.

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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