Check Point Advisories

MCP Atlassian Arbitrary File Write (CVE-2026-27825)

Vulnerability
Protection

Check Point Reference:	CPAI-2026-9606
Date Published:	3 Aug 2026
Severity:	High
Last Updated:	Monday 03 August, 2026
Source:
Industry Reference:	CVE-2026-27825
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	MCP Atlassian prior to 0.17.0
Vulnerability Description	A arbitrary file write vulnerability in MCP Atlassian allows attackers to write arbitrary content to any path the server process has write access to, potentially achieving code execution.

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

In the IPS tab, click Protections and find the MCP Atlassian Arbitrary File Write (CVE-2026-27825) protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Web Server Enforcement Violation.
Attack Information: MCP Atlassian Arbitrary File Write (CVE-2026-27825)