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CVE-2026-70470: Flowise is a drag & drop user interface to build a customized large language model flow

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CRITICAL 9.8REMOTEUPGRADE

CVE-2026-70470 is a critical-severity flaw (CVSS 9.8) affecting flowise. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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/

Why this priority

  • Critical severity
  • Public exploit reference
  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score9.8 (Critical)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance1.0% (top 38%)
CISA exploited listNo
WeaknessCWE-184
Published2026-08-04
Last modified2026-10-23
Publisher (CNA): GitHub, Inc. · Vendor: flowiseai

Am I affected?

Timeline

flowiseai flowise UPGRADE
Affected: < 3.1.3
Fixed in: 3.1.3
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy flowise || rpm -q flowise || flowise --version
2. UPGRADE to 3.1.3 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade flowise
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade flowise
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

npm · flowise · FIXED · 3.1.3 · vulnerable: <= 3.1.2 · source
npm install flowise@">=3.1.3" npm ls flowise
npm · flowise-components · FIXED · 3.1.3 · vulnerable: <= 3.1.2 · source
npm install flowise-components@">=3.1.3" npm ls flowise-components
Fedora 46 · pspp · FIXED · 2.1.3-2.fc46 · FEDORA-2026-0d6444911b · source
sudo dnf upgrade --advisory=FEDORA-2026-0d6444911b
Fedora ELN · barman · FIXED · 3.20.1-3.eln159 · FEDORA-2026-45ecf042c2 · source
sudo dnf upgrade --advisory=FEDORA-2026-45ecf042c2

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-70470?

flowise: upgrade to 3.1.3. Exact commands for each OS are on this page.

Is CVE-2026-70470 being exploited?

CVE-2026-70470 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-70470 affect?

CVE-2026-70470 affects flowise. Severity is critical (CVSS 9.8). 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 identif

How urgent is CVE-2026-70470?

Priority 60/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

References

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