Vulnerability library
Security checkAugust 04, 2026

Flowise: Pyodide validator Unicode homoglyph bypass leads to RCE

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Description

The validatePythonCodeForDataFrame blacklist in packages/components/src/pythonCodeValidator.ts can be bypassed with Unicode homoglyph identifiers, allowing arbitrary Python execution inside Pyodide and full OS command execution on the Flowise host via Pyodide’s js module interop.

Recommendation

Update the flowise-components package to the latest compatible version. Followings are version details:

  • Affected version(s): <= 3.1.2
  • Patched version(s): 3.1.3

References

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Related Issues

See something that needs correcting? Let us knowUpdated August 04, 2026