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AgentProv

2025-06 · 2025-Q2

Anthropic Filesystem MCP Server "EscapeRoute"

Primary layerL6 Identity / RunSecondary:L5 Config

Which agent, run, or tenant is this?

The question layer 6 asks, and failed here.
Fixable
Vendor patch
Vendor response
Patched
In the wild
No
Actor
Attacker

Target

Anthropic Filesystem MCP Server

Impact

Sandbox escape, arbitrary file access, root-level compromise possible

Root cause

Naive startswith path validation; no symlink validation

CVEs

Sources

Catalog

Cite this: AgentProv incident record: Anthropic Filesystem MCP Server "EscapeRoute" (2025-06). https://agentprov.com/incidents/2025-06-anthropic-filesystem-mcp-server-escaperoute