CVE-2026-41264Public exploitNetwork attack vector

Unauthenticated code execution via bypassable Python validation

Published Apr 23, 2026 · Updated Apr 23, 2026

Remote code execution in Flowise before 3.1.0 allows remote attackers to run commands through prompts sent to a CSV Agent chatflow. CSV_Agents.run executes LLM-generated Python in Pyodide after validatePythonCodeForDataFrame checks an incomplete forbidden-pattern list that permits combined imports such as pandas with os. Exploitation requires a reachable chatflow using the CSV Agent node and a model response shaped by prompt injection; commands run with the Flowise service account's privileges.

CVSS severity9.2
Critical
EPSS probability1.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in Flowise before 3.1.0 allows remote attackers to run commands through prompts sent to a CSV Agent chatflow. CSV_Agents.run executes LLM-generated Python in Pyodide after validatePythonCodeForDataFrame checks an incomplete forbidden-pattern list that permits combined imports such as pandas with os. Exploitation requires a reachable chatflow using the CSV Agent node and a model response shaped by prompt injection; commands run with the Flowise service account's privileges.

The record

CVE
CVE-2026-41264
Published
Apr 23, 2026
Updated
Apr 23, 2026
Vendor
FlowiseAI
Product
Flowise
Classifications
CWE-184, T1059.006
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FlowiseAI · Flowiseversion=< 3.1.0

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.2GitHub, Inc.CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-184Incomplete List of Disallowed Inputs
T1059.006Command and Scripting Interpreter Python

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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