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CVE-2025-49131— FastGPT Sandbox Vulnerable to Sandbox Bypass

Quick assessment

Affected
labring FastGPT
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

CVSS 6.3 · Medium EPSS 0.45% · P37
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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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
关键资源的不正确权限授予
Source: CVE Program / CVE List V5
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

Vendor Product Affected Versions CPE Subscribe
labring FastGPT < 4.9.11 -

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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III. Intelligence Information for CVE-2025-49131

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Vendor Advisories for CVE-2025-49131 (1)

IV. Related Vulnerabilities

Same product: FastGPT
Same vendor: labring
Same weakness: CWE-732

V. Comments for CVE-2025-49131

Anonymous User
2026-01-15 06:09:01

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