From c1775621079f03f3ad11d3b43e3506e6099d046a Mon Sep 17 00:00:00 2001
From: water <672684719@qq.com>
Date: Wed, 29 Jul 2026 11:24:37 +0800
Subject: [PATCH] fix: limit request body size in BSON binder

---
 binding/bson.go | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/binding/bson.go b/binding/bson.go
index 464890f0..37736d06 100644
--- a/binding/bson.go
+++ b/binding/bson.go
@@ -5,6 +5,7 @@
 package binding
 
 import (
+	"errors"
 	"io"
 	"net/http"
 
@@ -18,11 +19,14 @@ func (bsonBinding) Name() string {
 }
 
 func (b bsonBinding) Bind(req *http.Request, obj any) error {
-	buf, err := io.ReadAll(req.Body)
-	if err == nil {
-		err = b.BindBody(buf, obj)
+	body, err := io.ReadAll(io.LimitReader(req.Body, MaxBodySize+1))
+	if err != nil {
+		return err
 	}
-	return err
+	if int64(len(body)) > MaxBodySize {
+		return errors.New("request body too large")
+	}
+	return b.BindBody(body, obj)
 }
 
 func (bsonBinding) BindBody(body []byte, obj any) error {