Check Point Advisories

Marimo Remote Code Execution (CVE-2026-39987)

Check Point Reference: CPAI-2026-3442
Date Published: 26 Apr 2026
Severity: Critical
Last Updated: Sunday 26 April, 2026
Source:
Industry Reference:CVE-2026-39987
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable? Marimo 0.20.4 and prior
Vulnerability Description A remote code execution vulnerability in Marimo allows attackers to obtain a full PTY shell and execute arbitrary system commands via WebSocket endpoint, which lacks authentication validation.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R81 / R80 / R77 / R75

  1. In the IPS tab, click Protections and find the Marimo Remote Code Execution (CVE-2026-39987) protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  Web Server Enforcement Violation.
Attack Information:  Marimo Remote Code Execution (CVE-2026-39987)

×
  Feedback
This website uses cookies for its functionality and for analytics and marketing purposes. By continuing to use this website, you agree to the use of cookies. For more information, please read our Cookies Notice.
OK