CVE-2026-70477 : faille critique flowiseai flowise (CVSS 9.8)

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, a prompt injection sent to a chatflow using a CSV Agent node can cause the LLM to respond with a malicious Python script that bypasses the blocklist validator and executes in an unsandboxed Pyodide environment. The specific flaw exists within the run method of the CSV_Agents class, where untrusted data is used to construct an LLM prompt and the resulting pythonCode is validated by validatePythonCodeForDataFrame before execution. An attacker can leverage this to execute arbitrary code in the context of the service account. This issue is fixed in 3.1.3.

Sévérité

Critique (CVSS 9.8)

Vecteur CVSS

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation active

Non signalée par la CISA

Publication

4 août 2026

Dernière mise à jour

11 sept. 2026

• flowiseai flowise

• Fiche CVE-2026-70477 sur le NVD (NIST)
• github.com/FlowiseAI/Flowise/commit/f4e2794f6a576b94578f2…
• github.com/FlowiseAI/Flowise/pull/6499
• github.com/FlowiseAI/Flowise/releases/tag/[email protected]
• github.com/FlowiseAI/Flowise/security/advisories/GHSA…