CVE-2026-86541: knowns Path Traversal in the code.replace MCP Action
An editing tool that accepts an absolute path and uses it verbatim is not a code editor with a bug. It is a file-write API that happens to be pointed at code most of the time.
An editing tool that accepts an absolute path and uses it verbatim is not a code editor with a bug. It is a file-write API that happens to be pointed at code most of the time.
When an MCP tool argument reaches filepath.Join unvalidated, the attacker does not need to touch the server at all — they only need to get one sentence into something the model reads.