CVE-2026-32128

FastGPT is an AI Agent building platform. In 4.14.7 and earlier, FastGPT's Python Sandbox (fastgpt-sandbox) includes guardrails intended to prevent file writes (static detection + seccomp). These guardrails are bypassable by remapping stdout (fd 1) to an arbitrary writable file descriptor using fcntl. After remapping, writing via sys.stdout.write() still satisfies the seccomp rule write(fd==1), enabling arbitrary file creation/overwrite inside the sandbox container despite the intended no file writes restriction.

The following products are affected by CVE-2026-32128 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-32128.

URL	Resource
https://github.com/labring/FastGPT/security/advisories/GHSA-6hw6-mxrm-v6wj