CVE-2026-55071Public exploitHinoki check available

OS command execution via newline package injection

Published Sep 21, 2026 · Updated Sep 21, 2026

Command injection in MCP-for-Stata before 1.19.0 allows local users to execute OS commands through ado_package_install. SSC_Install.install interpolates the package argument into a multiline Stata command and passes it verbatim to pexpect.sendline without allowlisting, newline rejection, or quoting. The tool is enabled by the default all profile, and an injected shell escape runs with the account privileges of the Stata-MCP server.

CVSS severity8.4
High
EPSS probability0.25%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Get started

Summary

What happened

Command injection in MCP-for-Stata before 1.19.0 allows local users to execute OS commands through ado_package_install. SSC_Install.install interpolates the package argument into a multiline Stata command and passes it verbatim to pexpect.sendline without allowlisting, newline rejection, or quoting. The tool is enabled by the default all profile, and an injected shell escape runs with the account privileges of the Stata-MCP server.

The record

CVE
CVE-2026-55071
Published
Sep 21, 2026
Updated
Sep 21, 2026
Vendor
Sepine Tam
Product
MCP-for-Stata
Classifications
CWE-94, T1059
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=< 1.19.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Sepine Tam · MCP-for-Stataversion=< 1.19.0

Published CVSS scores

8.4GitHubCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A: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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Get started