diff --git a/go.mod b/go.mod
index 51cfc53c..4b3cc60e 100644
--- a/go.mod
+++ b/go.mod
@@ -63,6 +63,6 @@ require (
 	golang.org/x/text v0.41.0 // indirect
 	google.golang.org/genproto/googleapis/api v0.0.0-20260819154853-08b0e4226688 // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20260819154853-08b0e4226688 // indirect
-	google.golang.org/grpc v1.83.1 // indirect
+	google.golang.org/grpc v1.83.2 // indirect
 	google.golang.org/protobuf v1.36.12 // indirect
 )
diff --git a/go.sum b/go.sum
index 64e2aaa9..12d7eb85 100644
--- a/go.sum
+++ b/go.sum
@@ -122,8 +122,8 @@ google.golang.org/genproto/googleapis/api v0.0.0-20260819154853-08b0e4226688 h1:
 google.golang.org/genproto/googleapis/api v0.0.0-20260819154853-08b0e4226688/go.mod h1:1RJ9BQGyNdZwkGc1eTqkErfRZ6RJyYPHZo73BZ1vQqI=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20260819154853-08b0e4226688 h1:cYNAzI2sUwhmCcoj9TxvihSrqsxt6uIkj3rDRhSDmW4=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20260819154853-08b0e4226688/go.mod h1:DjtHYE8FKJLivXcBEjGwndXfIC23G0VpXiXKqG179uA=
-google.golang.org/grpc v1.83.1 h1:HIO0+BEtBP6soyqvqC8sNUjZ7bTs+0hFQuFF+RAy++Y=
-google.golang.org/grpc v1.83.1/go.mod h1:kDyl6SKsiHKt0uylY5gtn5cEjkrIOhQOGDgIc4JGwzQ=
+google.golang.org/grpc v1.83.2 h1:EManeRomTObA0BU7I8vXgg/78uE5MJ9M8B39EX2WscU=
+google.golang.org/grpc v1.83.2/go.mod h1:YPI1hK3kDked6iHvgX3tR0y+nX/qpMFKhPgFsokw1S8=
 google.golang.org/protobuf v1.36.12 h1:pJOKDDOyeXErUroCihFAd5LQuwXBSpVnKGrj5o/fwxc=
 google.golang.org/protobuf v1.36.12/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
diff --git a/vendor/google.golang.org/grpc/internal/transport/http2_server.go b/vendor/google.golang.org/grpc/internal/transport/http2_server.go
index 63c6539a..82e13e64 100644
--- a/vendor/google.golang.org/grpc/internal/transport/http2_server.go
+++ b/vendor/google.golang.org/grpc/internal/transport/http2_server.go
@@ -522,6 +522,12 @@ func (t *http2Server) operateHeaders(ctx context.Context, frame *http2.MetaHeade
 		delete(mdata, "host")
 	}
 
+	// If :authority is still missing, i.e. no host or :authority header is
+	// present, reject the request as invalid.
+	if len(mdata[":authority"]) == 0 {
+		t.writeEarlyAbort(streamID, s.contentSubtype, status.New(codes.Internal, "no host or :authority header present"), http.StatusBadRequest, !frame.StreamEnded())
+		return nil
+	}
 	if frame.StreamEnded() {
 		// s is just created by the caller. No lock needed.
 		s.state = streamReadDone
diff --git a/vendor/google.golang.org/grpc/version.go b/vendor/google.golang.org/grpc/version.go
index 64ec3b3c..835dc07f 100644
--- a/vendor/google.golang.org/grpc/version.go
+++ b/vendor/google.golang.org/grpc/version.go
@@ -19,4 +19,4 @@
 package grpc
 
 // Version is the current grpc version.
-const Version = "1.83.1"
+const Version = "1.83.2"
diff --git a/vendor/modules.txt b/vendor/modules.txt
index fdbcc0b0..cfc85411 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -229,7 +229,7 @@ google.golang.org/genproto/googleapis/api/httpbody
 ## explicit; go 1.25.0
 google.golang.org/genproto/googleapis/rpc/errdetails
 google.golang.org/genproto/googleapis/rpc/status
-# google.golang.org/grpc v1.83.1
+# google.golang.org/grpc v1.83.2
 ## explicit; go 1.25.0
 google.golang.org/grpc
 google.golang.org/grpc/attributes