External risk intelligence

Pymetasploit3 Command Injection Vulnerability.

CVE advisorySeverity: CRITICAL (CVSS 9.3)

CVE-2026-5463

A command injection vulnerability in pymetasploit3 allows attackers to execute unintended commands, potentially leading to arbitrary command execution and manipulation of sessions. This impacts organizations using the affected library, posing a risk to data and systems.

1Halo Surface Signal

Command Injection

Danmcinerney Pymetasploit3

1.0.6 and earlier

External exposure likelihood

Halo Surface Signal score for CVE-2026-5463

This vulnerability exists in a Python library (pymetasploit3) used for interacting with the Metasploit Framework. It is a developer-focused automation tool, not a public-facing service, gateway, or internet appliance. Its typical deployment is within local development, testing, or internal security automation environments, which are not designed for public network exposure.

Horizon Alert

Summary of the vulnerability and why it matters

A vulnerability in pymetasploit3 could allow attackers to execute unintended commands. This occurs when newline characters are injected into module options, disrupting the intended command structure. The potential impact includes arbitrary command execution and manipulation of Metasploit sessions.

  • Vulnerable: pymetasploit3
  • Flaw: Command injection via newline characters
  • Impact: Unintended command execution

Attack Path

How an attacker could exploit the issue

Exploitation of this vulnerability could allow an attacker to execute unintended commands within the Metasploit console. This is achieved by inserting newline characters into module options, which alters the command structure. This manipulation can lead to the execution of arbitrary commands and unauthorized control over Metasploit sessions.

  • Unprotected console access.
  • Attacker injects newline characters.
  • Unintended commands execute.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow attackers to execute unintended commands within the Metasploit console. This could lead to the manipulation of Metasploit sessions and potential arbitrary command execution. The Metasploit framework is a tool used for developing and executing security exploits.

  • Attackers may require moderate skill.
  • Unauthenticated access to the Metasploit console is needed.
  • Business risk is elevated due to potential session manipulation.

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability allows for unauthorized command execution by injecting malicious characters into module options. Attackers could manipulate Metasploit sessions and gain control of systems. The potential for arbitrary command execution poses a significant risk to organizational data and systems.

  • Identify exposed assets and systems.
  • Reduce exposure or isolate affected systems.
  • Apply vendor fixes and validate implementation.
  • Monitor for related security incidents.

Frequently asked questions

What is pymetasploit3 and how does it relate to the Metasploit Framework?

pymetasploit3 is a Python library designed to interface with the Metasploit Framework. The Metasploit Framework is a widely-used resource for creating, testing, and deploying security exploits. pymetasploit3 enables developers and security professionals to automate various tasks and integrate Metasploit's capabilities into custom applications or automated workflows.

What type of weakness does CVE-2026-5463 represent and how is it exploited?

CVE-2026-5463 is a command injection vulnerability (CWE-77). Attackers can exploit this by inserting newline characters into module options, such as RHOSTS. This action disrupts the expected command structure, leading the Metasploit console to execute unintended commands.

How can an attacker trigger command injection via CVE-2026-5463?

Exploitation occurs when an attacker injects newline characters into module options, like RHOSTS, within the pymetasploit3 library. This manipulation breaks the intended command sequence, allowing the Metasploit console to process and execute additional, unintended commands.

What is the relevance of CVE-2026-5463 in the context of the Halo Surface Signal?

The Halo Surface Signal indicates a very low likelihood of this vulnerability being exploited. This is because pymetasploit3 is a developer tool for the Metasploit Framework, typically used in controlled environments rather than public-facing systems.

What steps should be taken to address the command injection vulnerability in pymetasploit3?

To mitigate this vulnerability, identify and isolate any systems where pymetasploit3 is exposed. It is crucial to apply any available vendor updates or patches for pymetasploit3 and subsequently validate that the fixes have been correctly implemented. Continuous monitoring for any related security incidents is also recommended.

References