CVE-2026-32128
mediumpriority · track · 10EPSS 0.003 · 23 %ileexploit · PoCEUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
exploits (1)
Public proof-of-concept and weaponised exploit code.
affected products (2)
Products and version ranges known to be affected.
also known as (2)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (4)
External citations — patches, advisories, analysis.
- https://github.com/labring/FastGPT/releasesPatchcnnvd
- https://github.com/labring/FastGPT/security/advisories/GHSA-6hw6-mxrm-v6wjcnnvd
- https://github.com/labring/FastGPT/security/advisories/GHSA-6hw6-mxrm-v6wjenisa_euvd
- https://github.com/labring/FastGPT/security/advisories/GHSA-6hw6-mxrm-v6wjExploitMitigationVendor Advisorynvd
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