CVE-2026-94031Public exploitNetwork attack vectorHinoki check available

Authenticated command execution via shell-interpolated URL

Published Sep 20, 2026 · Updated Sep 20, 2026

Command injection in Nexus MCP at commit aed0026e7ac1f23dc940e46e9fd3a2da6904f914 allows remote authenticated users to execute OS commands. The nexus_reauth tool embeds its user-controlled url argument in a platform-specific command string that src/auth/browser.ts executes with child_process.exec, allowing shell metacharacters to escape the quoted URL. Access to the MCP interface is required, and injected commands run with the privileges of the Nexus MCP process.

CVSS severityUnavailable
Unscored
EPSS probability1.07%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Command injection in Nexus MCP at commit aed0026e7ac1f23dc940e46e9fd3a2da6904f914 allows remote authenticated users to execute OS commands. The nexus_reauth tool embeds its user-controlled url argument in a platform-specific command string that src/auth/browser.ts executes with child_process.exec, allowing shell metacharacters to escape the quoted URL. Access to the MCP interface is required, and injected commands run with the privileges of the Nexus MCP process.

The record

CVE
CVE-2026-94031
Published
Sep 20, 2026
Updated
Sep 20, 2026
Vendor
0-Gaurav-0
Product
Nexus MCP
Classifications
CWE-77, CWE-74, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 20, 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=aed0026e7ac1f23dc940e46e9fd3a2da6904f914

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

0-Gaurav-0 · Nexus MCPversion=aed0026e7ac1f23dc940e46e9fd3a2da6904f914

Published CVSS scores

6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
5.3VulDBCVSS: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:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Command Injection
CWE-74Injection
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

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Your stack

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