CriticalVulnerability

GHSA-52fh-8v99-63c2: Flowise: Pyodide validator Unicode homoglyph bypass leads to RCE

Source: GitHub Advisory(opens in a new tab)
Identifiers: CVE-2026-70470GHSA-52fh-8v99-63c2
Published: August 4, 2026
Record updated: October 9, 2026

Affected: flowise-components <= 3.1.2
flowise <= 3.1.2
Fixed in: 3.1.3
flowise-components 3.1.3 released June 25, 2026, 40 days before disclosure
flowise 3.1.3 released June 25, 2026, 40 days before disclosure
Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 1.0%

Summary

The validatePythonCodeForDataFrame blacklist in Flowise's packages/components/src/pythonCodeValidator.ts can be bypassed with Unicode homoglyph identifiers, letting arbitrary Python run inside Pyodide and full OS command execution on the Flowise host through Pyodide's js module interop. The validator gates pyodide.runPythonAsync calls in the CSV Agent and Airtable Agent, and the source says this reopens the paths patched as GHSA-3hjv-c53m-58jj and GHSA-v38x-c887-992f. The source states the original patches are effectively reintroduced in 3.1.2.

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

Details

Scores and exploitation

Patch available: Yes
EPSS: 1.0%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on November 5, 2026.
Disclosure date: August 4, 2026

Affected

Packages: flowise-components@<= 3.1.2 (fixed: 3.1.3)
flowise@<= 3.1.2 (fixed: 3.1.3)

Classification

Attack type: Other
Attack sophistication: Moderate
AI component targeted: Agent
Impact: Confidentiality,
Integrity,
Availability
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative.

Original source: https://github.com/advisories/GHSA-52fh-8v99-63c2

First tracked: August 4, 2026 at 02:00 PM ET, from GitHub Advisory Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 90% (self-assessed)

Affected packages in the Exposure Registry

Matched by package name and ecosystem. Each entry shows whether the package delegates to a language model and how many tracked packages depend on it.

flowisenpmLLM dependency since 2024-03-12
flowise-componentsnpmLLM dependency since 2023-04-10 · 1 tracked dependent

Summary

Mitigation

Affected packages in the Exposure Registry

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