Understanding and Defending Against Arbitrary Local File Read Vulnerability in firecrawl-mcp-server
This educational analysis delves into CVE-2026-85606, an arbitrary local file read vulnerability in firecrawl-mcp-server version 3.20.2. The vulnerability allows attackers to read sensitive files by supplying unconstrained filePath arguments without directory containment validation. We will explore the root cause, attack surface, exploitation mechanics, real-world impact, and defensive strategies to protect against this threat.