diff --git a/api/server/router/container/container_routes.go b/api/server/router/container/container_routes.go
index bb560cb994..7a07753e00 100644
--- a/api/server/router/container/container_routes.go
+++ b/api/server/router/container/container_routes.go
@@ -940,9 +940,11 @@ func (s *containerRouter) postContainersAttach(ctx context.Context, w http.Respo
 			if multiplexed && versions.GreaterThanOrEqualTo(httputils.VersionFromContext(ctx), "1.42") {
 				contentType = types.MediaTypeMultiplexedStream
 			}
-			fmt.Fprintf(conn, "HTTP/1.1 101 UPGRADED\r\nContent-Type: "+contentType+"\r\nConnection: Upgrade\r\nUpgrade: tcp\r\n\r\n")
+			// FIXME(thaJeztah): we should not ignore errors here; see https://github.com/moby/moby/pull/48359#discussion_r1725562802
+			fmt.Fprintf(conn, "HTTP/1.1 101 UPGRADED\r\nContent-Type: %v\r\nConnection: Upgrade\r\nUpgrade: tcp\r\n\r\n", contentType)
 		} else {
-			fmt.Fprintf(conn, "HTTP/1.1 200 OK\r\nContent-Type: application/vnd.docker.raw-stream\r\n\r\n")
+			// FIXME(thaJeztah): we should not ignore errors here; see https://github.com/moby/moby/pull/48359#discussion_r1725562802
+			fmt.Fprint(conn, "HTTP/1.1 200 OK\r\nContent-Type: application/vnd.docker.raw-stream\r\n\r\n")
 		}
 
 		go notifyClosed(ctx, conn, cancel)
diff --git a/api/server/router/image/image_routes.go b/api/server/router/image/image_routes.go
index 4550507680..67db9097f7 100644
--- a/api/server/router/image/image_routes.go
+++ b/api/server/router/image/image_routes.go
@@ -141,7 +141,7 @@ func (ir *imageRouter) postImagesCreate(ctx context.Context, w http.ResponseWrit
 		id, progressErr = ir.backend.ImportImage(ctx, tagRef, platform, comment, layerReader, r.Form["changes"])
 
 		if progressErr == nil {
-			output.Write(streamformatter.FormatStatus("", id.String()))
+			_, _ = output.Write(streamformatter.FormatStatus("", "%v", id.String()))
 		}
 	}
 	if progressErr != nil {