CVE-2025-49131— FastGPT Sandbox Vulnerable to Sandbox Bypass
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I. Basic Information for CVE-2025-49131
Vulnerability Information
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Vulnerability Title
FastGPT Sandbox Vulnerable to Sandbox Bypass
Source: NVD (National Vulnerability Database)
Vulnerability Description
FastGPT is an open-source project that provides a platform for building, deploying, and operating AI-driven workflows and conversational agents. The Sandbox container (fastgpt-sandbox) is a specialized, isolated environment used by FastGPT to safely execute user-submitted or dynamically generated code in isolation. The sandbox before version 4.9.11 has insufficient isolation and inadequate restrictions on code execution by allowing overly permissive syscalls, which allows attackers to escape the intended sandbox boundaries. Attackers could exploit this to read and overwrite arbitrary files and bypass Python module import restrictions. This is patched in version 4.9.11 by restricting the allowed system calls to a safer subset and additional descriptive error messaging.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
关键资源的不正确权限授予
Source: NVD (National Vulnerability Database)
Vulnerability Title
FastGPT 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FastGPT是labring开源的一款基于大语言模型的开源知识库问答系统。 FastGPT 4.9.11之前版本存在安全漏洞，该漏洞源于沙箱隔离不足，可能导致文件读取和写入。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-49131
| # | POC Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | None | https://github.com/Wenura17125/cve-2025-49131-poc | POC Details |
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- python sandbox bypass · Advisory · labring/FastGPT · GitHubx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2025-49131
IV. Related Vulnerabilities
Same product: FastGPT
- CVE-2026-44286
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FastGPT: Cloud metadata endpoint SSRF protection bypass via - CVE-2026-42344
FastGPT: DNS rebinding TOCTOU bypass in isInternalAddress al - CVE-2026-42343
FastGPT: Uncontrolled Resource Consumption leading to Sandbo
Same vendor: labring
- CVE-2026-44286
FastGPT: SSRF Vulnerability in Laf Workflow Node via Missing - CVE-2026-44284
FastGPT: Stored MCP tool URL SSRF in FastGPT workflow execut - CVE-2026-42345
FastGPT: Cloud metadata endpoint SSRF protection bypass via - CVE-2026-42344
FastGPT: DNS rebinding TOCTOU bypass in isInternalAddress al - CVE-2026-42343
FastGPT: Uncontrolled Resource Consumption leading to Sandbo
Same weakness: CWE-732
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V. Comments for CVE-2025-49131
Anonymous User
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