CVE-2026-90617Public exploitNetwork attack vector

Unauthenticated command execution via MCP run_task

Published Sep 14, 2026 · Updated Sep 14, 2026

OS command injection in GH05TCREW PentestAgent allows remote attackers to execute shell commands through the unauthenticated MCP HTTP server. The /mcp run_task handler accepts attacker-supplied task text without authentication and passes resulting terminal commands to LocalRuntime's create_subprocess_shell with no filtering or sandbox. Exposure requires the SSE server to be network reachable with LocalRuntime enabled; successful requests run with the PentestAgent process account and can read or alter host data.

CVSS severityUnavailable
Unscored
EPSS probability1.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in GH05TCREW PentestAgent allows remote attackers to execute shell commands through the unauthenticated MCP HTTP server. The /mcp run_task handler accepts attacker-supplied task text without authentication and passes resulting terminal commands to LocalRuntime's create_subprocess_shell with no filtering or sandbox. Exposure requires the SSE server to be network reachable with LocalRuntime enabled; successful requests run with the PentestAgent process account and can read or alter host data.

The record

CVE
CVE-2026-90617
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
GH05TCREW
Product
PentestAgent
Classifications
T1190, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 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?

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  1. Affected versionversion=cf882dabea3ed91cef016cdd115e5426315665a2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

GH05TCREW · PentestAgentversion=cf882dabea3ed91cef016cdd115e5426315665a2

Published CVSS scores

No CVSS assessment is available in this record.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1190Exploit Public-Facing Application
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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