---
id: "CVE-2023-43208"
kind: "vulnerability"
aliases: ["CVE-2023-43208"]
title: "nextgen mirth connect: NextGen Healthcare Mirth Connect before version 4.4.1 is vulnerable to unauthenticated remote code execution"
severity: "critical"
cvss: 9.8
epss: null
exploited: true
status: "open"
category: "package"
products: [{"name": "NextGen Healthcare Mirth Connect", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "nextgen mirth connect", "fixed": ["4.4.1"], "affected": "< 4.4.1", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "healthcare", "mirth-connect", "package", "ransomware", "self-hosted"]
not_affected_if: ["unknown"]
published_at: "2023-10-26T17:15:09+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T22:29:05+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-43208", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-43208", "first_seen_at": "2026-10-23T22:29:05+00:00"}]
---

# nextgen mirth connect: NextGen Healthcare Mirth Connect before version 4.4.1 is vulnerable to unauthenticated remote code execution

NextGen Healthcare Mirth Connect, a healthcare integration engine, has an unsafe deserialization flaw that lets an unauthenticated remote attacker send a crafted request. The attacker can run code on the server, and CISA lists it as actively exploited with ransomware use.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:NextGen Healthcare Mirth Connect affected ? fixed ?
- vendor:nextgen mirth connect affected < 4.4.1 fixed 4.4.1

## Fix

Apply the vendor mitigation or upgrade per NextGen guidance; CISA says to discontinue use if no mitigation is available.

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-43208
- 2026-10-23T22:29:05+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2023-43208

## From the sources

NextGen Healthcare Mirth Connect contains a deserialization of untrusted data vulnerability that allows for unauthenticated remote code execution via a specially crafted request.

CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_