Flowise before 3.1.3 Prompt Injection RCE via CSV Agent

published 2026-08-13 2 mo ago modified 2026-10-24 16 d ago also GHSA-w7x8-q2gp-5cgg , EUVD-2026-57803

cvss: 9.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.0%; EPSS 1.0% chance of exploitation in 30 days, percentile 61%
public exploits: 0; none known

Flowise before 3.1.3 contains a regex-based Python code validator bypass in CSV and Airtable Agent nodes that allows unauthenticated attackers to inject malicious code via prompt injection. Attackers can exploit unblocked pandas functions like pd.read_json() to exfiltrate datasets, perform SSRF against internal services, or achieve code execution through the unauthenticated prediction API.

Patch / fix

fixed in 3

npm flowise 3.1.3
npm flowise-components 3.1.3
FlowiseAI Flowise 3.1.3

CISA SSVC

Exploitation: Proof of concept is public
Automatable: yes
Technical impact: total
Assessed: 2 mo ago (2026-08-14)

Exploit prediction

0.96% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-w7x8-q2gp-5cgg referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	9.0	CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N
CNA	4.0	9.0	CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/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

Affected packages

ecosystem	package	affected	fixed in
npm	flowise	<3.1.3	3.1.3
npm	flowise-components	<3.1.3	3.1.3

Affected products

FlowiseAI Flowise

Classification

Weakness

CWE-94 Improper Control of Generation of Code

References

github.com /FlowiseAI/Flowise/security/advisories/GHSA-w7x8-q2gp-5cgg
vendor-advisory, exploit, web, mitigation
vulncheck.com /advisories/flowise-before-prompt-injection-rce-via-csv-agent
third-party-advisory, web
nvd.nist.gov /vuln/detail/CVE-2026-73487
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