Critical RCE and SSRF Vulnerabilities Discovered in Popular mcp-atlassian Server

#cybersecurity #infosec

Summary

mcp-atlassian versions before 0.17.0 contain vulnerabilities (CVE-2026-27825 and CVE-2026-27826) that allow unauthenticated attackers to execute remote code and perform SSRF attacks by exploiting missing path validation and insecure header handling.

Take Action:

If you use mcp-atlassian, update to version 0.17.0 ASAP. Since these servers run with high privileges and no authentication by default, network isolation is your first defense against unauthorized access and lateral movement withing environments.

Read the full article on BeyondMachines

This article was originally published on BeyondMachines