maintainer edit: compare exact-file allowlist entries using logical paths and require the resolved target to stay at that canonical path, so symlinks or junctions cannot redirect canonical memory files to an external write target.
maintainer edit: Dream write tools used file paths as directory roots, so a missing canonical memory file could be treated as a parent directory. Add exact-file allowlist support and keep skills/ as the only Dream write directory.
- Apply _normalize_addr in _is_allowed_loopback_target so
::ffff:127.0.0.1 is correctly identified as loopback
- Add test for contains_internal_url with IPv6-mapped addresses
- Add test for whitelist + IPv6-mapped CGNAT interaction
::ffff:127.0.0.1 and ::ffff:169.254.169.254 are IPv6Address objects
that match neither the IPv4 blocklists (127.0.0.0/8, 169.254.0.0/16)
nor the IPv6 ones (::1/128), allowing SSRF bypass via DNS responses
that return IPv6-mapped IPv4 addresses.
Add _normalize_addr() to convert ipv4_mapped IPv6 addresses to their
IPv4 form before blocklist/allowlist matching.
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