---
title: "CVE-2025-55346: Flowise vulnerable to RCE via Dynamic function constructor injection"
url: https://erroneo.us/security/cve/CVE-2025-55346/
description: "CVE-2025-55346 (flowise (npm)): User-controlled input flows to an unsafe implementation of a dynamic Function constructor, allowing network attackers to run…"
type: vulnerability-record
section: "Security Digest"
date_published: 2025-08-14
date_modified: 2025-10-06
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2025-55346"
kev: false
cvss: 9.8
epss: 0.22368
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2025-55346: Flowise vulnerable to RCE via Dynamic function constructor injection

**Signal:** High exploit likelihood. EPSS ranks it in the top 5% of all CVEs for likely exploitation in the next 30 days. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 22.4% , percentile 98: FIRST’s model estimates a 22.4% chance of exploitation activity in the next 30 days, higher than 98% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes flowise (npm) <= 2.2.7-patch.1, no fixed version listed . Check your lockfile, including transitive dependencies.

## What it is

User-controlled input flows to an unsafe implementation of a dynamic Function constructor, allowing network attackers to run arbitrary unsandboxed JS code in the context of the host, by sending a simple POST request.

## Affected packages

- npm `flowise` <= 2.2.7-patch.1 → fixed: none listed

## Affected products (CVE record)

-  flowise: 0

## Severity

- JFROG CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.8 `CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 22.37% probability of exploitation activity in the next 30 days; percentile 98.

## Sources

- [GitHub Advisory GHSA-hmgh-466j-fx4c](https://github.com/advisories/GHSA-hmgh-466j-fx4c)
- [CVE.org record CVE-2025-55346](https://www.cve.org/CVERecord?id=CVE-2025-55346)
- [NVD entry CVE-2025-55346](https://nvd.nist.gov/vuln/detail/CVE-2025-55346)
- [research.jfrog.com](https://research.jfrog.com/vulnerabilities/flowise-js-injection-remote-code-exection-jfsa-2025-001379925/)
- [github.com](https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-hmgh-466j-fx4c)

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Source page: https://erroneo.us/security/cve/CVE-2025-55346/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt