Files
AthenaandCursor 1f6beed0d2 feat(security): SSRF guard on fetch_url + single-use tool-approval tokens
Two tool/agent-layer hardening changes:

* fetch_url now resolves the target host and refuses to connect if any
  resolved address is loopback, private (RFC1918/ULA), link-local (incl. the
  169.254.169.254 cloud-metadata endpoint), multicast, reserved, or
  unspecified. IPv4-mapped IPv6 is unwrapped first, and the guard re-runs on
  every redirect hop so a public URL cannot 302 its way to an internal target.

* /chat/approve now requires a single-use token minted when the stream pauses
  for approval and delivered only in that stream's tool_request event, compared
  in constant time. Previously the pending approval was keyed solely on a
  client-supplied conversation_id, so anyone who could enumerate a
  conversation_id could approve another client's pending action.

The frontend threads the token from the tool_request event into the approve
call.

Co-authored-by: Cursor <cursoragent@cursor.com>
2026-08-07 09:41:09 -05:00
..

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