Description
FastGPT is an AI Agent building platform. Prior to 4.15.0-beta1, the JavaScript sandbox worker at projects/code-sandbox/src/pool/worker.ts:356 blocks dynamic import() with the regex /\bimport\s*\(/.test(code). JavaScript syntax accepts a block comment between import and (; the regex matches only ASCII whitespace, and the bytes /, *, *, / are not in the \s character class. The payload import/**/("child_process") parses as a syntactically valid dynamic import that the regex does not detect. Because import() is not wrapped by the safeRequire Proxy (which only proxies require), the attacker loads child_process and calls execSync - arbitrary command execution as uid=100(sandbox) inside the sandbox container. This vulnerability is fixed in 4.15.0-beta1.
Problem types
CWE-94: Improper Control of Generation of Code ('Code Injection')
CWE-184: Incomplete List of Disallowed Inputs
Product status
References
github.com/...astGPT/security/advisories/GHSA-f5mq-qxm4-5mvc
github.com/...astGPT/security/advisories/GHSA-f5mq-qxm4-5mvc