diff --git a/httpx/ssrf.go b/httpx/ssrf.go
index a217c7dd..aaed40e5 100644
--- a/httpx/ssrf.go
+++ b/httpx/ssrf.go
@@ -86,6 +86,7 @@ func init() {
 		ssrf.WithNetworks("tcp4", "tcp6"),
 		ssrf.WithAllowedV4Prefixes(
 			netip.MustParsePrefix("10.0.0.0/8"),     // Private-Use (RFC 1918)
+			netip.MustParsePrefix("100.64.0.0/10"),  // Shared Address Space (RFC 6598)
 			netip.MustParsePrefix("127.0.0.0/8"),    // Loopback (RFC 1122, Section 3.2.1.3))
 			netip.MustParsePrefix("169.254.0.0/16"), // Link Local (RFC 3927)
 			netip.MustParsePrefix("172.16.0.0/12"),  // Private-Use (RFC 1918)
@@ -106,6 +107,7 @@ func init() {
 		ssrf.WithNetworks("tcp4"),
 		ssrf.WithAllowedV4Prefixes(
 			netip.MustParsePrefix("10.0.0.0/8"),     // Private-Use (RFC 1918)
+			netip.MustParsePrefix("100.64.0.0/10"),  // Shared Address Space (RFC 6598)
 			netip.MustParsePrefix("127.0.0.0/8"),    // Loopback (RFC 1122, Section 3.2.1.3))
 			netip.MustParsePrefix("169.254.0.0/16"), // Link Local (RFC 3927)
 			netip.MustParsePrefix("172.16.0.0/12"),  // Private-Use (RFC 1918)