Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-70470

CVE-2026-70470CRITICAL

FlowiseAI Flowise — Flowise: Pyodide validator Unicode homoglyph bypass leads to RCE

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   H   N   N   N   H   H   H    9.5   .0097   60.7     —

AFFECTED
  Product  Versions   Fixed
  Flowise  < 3.1.3 –  —

TIMELINE
  Aug 4   Reserved by GitHub_M
  Aug 4   Published (CNA: GitHub_M)
  Sep 14  EXPLOIT PUBLISHED — CVE-2026-70470 (FlowiseAI Flowise). Public exploit reference added.

CWE-184 · CNA: GitHub_M · CVSS v4.0 · 4 references · NVD status: Analyzed

Description

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, Flowise validatePythonCodeForDataFrame 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 js module interop. The validator gates pyodide.runPythonAsync in packages/components/nodes/agents/CSVAgent/CSVAgent.ts and packages/components/nodes/agents/AirtableAgent/AirtableAgent.ts with an ASCII word-boundary blacklist. JavaScript regex word boundaries are ASCII-only, while Python 3 NFKC-normalizes identifiers at parse time, so homoglyph forms such as __cl𝐚ss__, __subcl𝐚sses__, __b𝐚se__, and __b𝐮iltins__ bypass the blacklist and are parsed as their ASCII equivalents. This issue is fixed in version 3.1.3.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
August 4, 2026	Reserved	Reserved by GitHub_M
August 4, 2026	Published	Published (CNA: GitHub_M)
September 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-70470 (FlowiseAI Flowise). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
FlowiseAI	Flowise	—	< 3.1.3	—

Weaknesses

CWE-184

References (4)

https://github.com/FlowiseAI/Flowise/commit/f4e2794f6a576b94578f2fdafbf49c2fb304626c [Patch]
https://github.com/FlowiseAI/Flowise/pull/6499 [Issue Tracking, Patch]
https://github.com/FlowiseAI/Flowise/releases/tag/flowise@3.1.3 [Patch, Release Notes]
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-52fh-8v99-63c2 [Exploit, Vendor Advisory]

Authoritative record: CVE-2026-70470 at cve.org

Vendors: flowiseai

Weaknesses: CWE-184

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-70470 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.