Flowise: CSV Agent Prompt Injection Remote Code Execution Vulnerability

published 2026-04-21 6 mo ago modified 2026-10-26 13 d ago also GHSA-3hjv-c53m-58jj , EUVD-2026-25293

cvss: 9.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.8%; EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits: 1; Metasploit

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, the specific flaw exists within the run method of the CSV_Agents class. The issue results from the lack of proper sandboxing when evaluating an LLM generated python script. An attacker can leverage this vulnerability to execute code in the context of the user running the server. Using prompt injection techniques, an unauthenticated attacker with the ability to send prompts to a chatflow using the CSV Agent node may convince an LLM to respond with a malicious python script that executes attacker controlled commands on the Flowise server. This vulnerability is fixed in 3.1.0.

Patch / fix

fixed in 3

npm flowise 3.1.0
npm flowise-components 3.1.0
flowiseai flowise 3.1.0

Timeline

2026-04-21 Published
2026-04-22 First public exploit (Metasploit exploit/multi/http/flowise_auth_rce_cve_2026_41264)

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: total
Assessed: 6 mo ago (2026-04-24)

Exploit prediction

1.79% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

Metasploit exploit/multi/http/flowise_auth_rce_cve_2026_41264 Flowise CSV Agent Prompt Injection RCE metasploit exploit, excellent rank, 2026-04-22
github.com https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-3hjv-c53m-58jj referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	9.2	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
CNA	4.0	9.2	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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
npm	flowise	<3.1.0	3.1.0
npm	flowise-components	<3.1.0	3.1.0

Affected products

FlowiseAI Flowise

Classification

Weakness

CWE-184 Incomplete List of Disallowed Inputs

References

github.com /FlowiseAI/Flowise/security/advisories/GHSA-3hjv-c53m-58jj
exploit, web, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2026-41264
advisory
github.com /FlowiseAI/Flowise
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary