CVE-2025-49131 FastGPT Sandbox Vulnerable to Sandbox Bypass
Attackers can escape the FastGPT sandbox to execute arbitrary code and read or modify files due to insufficient syscall restrictions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-49131?
CVE-2025-49131 is a medium-severity vulnerability in labring FastGPT, published on 9 Jun 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-732
Which versions are affected by CVE-2025-49131?
It affects 1 product.
Products include Fastgpt Fastgpt.
How do I fix CVE-2025-49131?
No fix has been published for CVE-2025-49131 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-49131 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-49131 exists.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in labring FastGPT
- CVE-2026-34162 FastGPT: Unauthenticated SSRF via httpTools Endpoint Leads to Internal API Key Theft
- CVE-2026-40351 FastGPT: NoSQL Injection in loginByPassword leads to Authentication Bypass
- CVE-2026-33075 FastGPT has Arbitrary Code Execution in GitHub Actions via pull_request_target in fastgpt-preview-image.yml
- CVE-2026-40352 FastGPT: NoSQL Injection in updatePasswordByOld Leads to Account Takeover
- CVE-2026-34163 Server-Side Request Forgery via MCP Tools Endpoint in FastGPT
Sources
Also known as GHSA-f3pf-r3g7-g895.