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CVE-2026-70477

CriticalCVSS 9.5 / 10
Published Aug 4, 2026·Last modified Aug 7, 2026
Affected Components(282)
flowiseai/flowise
flowise@1.2.9
flowiseai/flowise
flowise@2.0.4
flowiseai/flowise
flowise-components@1.1.1
1 / 94
Description

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.

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Risk Scores
Base Score
9.5

The vulnerability can be exploited over the network without needing physical access. It is difficult for an attacker to exploit this vulnerability and may require special conditions. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.

Threat Intelligence
8.4

Exploitation activity has been observed. Apply available patches or mitigations urgently.

EPSS
0.81%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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