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514573b1f6
* fix(proxy-subscriptions): allow local/loopback proxy-subscription fetch URLs
The subscription fetch guard (fetchGuard.ts) unconditionally blocked all
loopback/private IP ranges as SSRF protection, but the same feature already
permits loopback for the routing half (coreEndpoint.ts's
ALLOWED_LOCAL_CORE_HOSTS) — so an operator could route traffic through a
loopback core but could not fetch a proxy list from a loopback HTTP server.
Make the fetch guard local-first by reusing the existing
areLocalProviderUrlsAllowed() policy (default ON) from
outboundUrlGuardPolicy.ts: loopback/private hosts are now allowed as fetch
targets by default, while cloud-metadata/link-local (169.254.0.0/16, incl.
169.254.169.254 IMDS) and the unspecified address stay blocked
unconditionally, mirroring the provider-validation guard's "block-metadata"
mode. Callers that want the old strict behavior can pass
{ allowLocal: false }.
Closes #10158.
* fix(proxy-subscriptions): unwrap IPv4-mapped IPv6 + full fe80::/10 range (#10416)
The #10158 SSRF guard left two gaps on the IPv6 side: an IPv4-mapped IPv6
literal (::ffff:a.b.c.d) skipped IPv4 range checking entirely, and the
link-local check only matched strings literally prefixed with "fe80"
instead of the full fe80::/10 range (fe80:: - febf:ffff::), so fe90::,
febf:ffff::, etc. were wrongly allowed through.
isIpv6Blocked() now unwraps mapped IPv4 addresses (both the dotted-quad
and WHATWG-normalized hex-group forms) and re-checks them against the
IPv4 rules, and link-local detection parses the first hex group's numeric
value against the 0xfe80-0xfebf range instead of a string prefix.
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Co-authored-by: adevwithpurpose <adevwithpurpose@users.noreply.github.com>