---
id: "CVE-2026-111450"
kind: "vulnerability"
aliases: ["CVE-2026-111450"]
title: "Wheels: Host header sets default error-email recipient, leaking error data"
severity: "medium"
cvss: 5.9
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["cfml", "coldfusion", "lucee", "package", "self-hosted", "wheels"]
not_affected_if: ["explicit-error-email-recipient", "no-mail-server", "wheels-4.1.2-or-later"]
published_at: "2026-10-16T04:18:31+00:00"
first_seen_at: "2026-10-23T21:57:12+00:00"
updated_at: "2026-10-25T04:09:53+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-111450", "first_seen_at": "2026-10-23T21:57:12+00:00"}]
---

# Wheels: Host header sets default error-email recipient, leaking error data

Wheels through 4.1.1 takes its default production error-email address from the Host header of the request that starts the application. An attacker who triggers a cold start with a chosen Host can redirect later error emails to an address they control, exposing error and request metadata, and possibly configuration secrets or session data on some engines.

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

## How to check

- Check the Wheels version in the application's dependencies (`4.1.1` or earlier is affected)
- Check whether an explicit error-email recipient is set in the Wheels configuration; if it is, the default is not used
- Check whether a mail server is configured for the application

## Fix

- Upgrade Wheels to `4.1.2`
- Set an explicit error-email recipient in the Wheels configuration as an interim measure

## Timeline

- 2026-10-23T21:57:12+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-111450

## From the sources

Wheels through 4.1.1 derives its default production error-email address from the Host header of the request that starts the application. If no explicit error-email recipient is configured, a mail server is configured, and the server accepts an attacker-chosen Host, an attacker whose request triggers a cold start can direct later error emails to an address under their control for that application's lifetime. Emails disclose error and request metadata; on engines/versions where scope dumps render, they may also disclose configuration secrets and other users' session/cookie data. On the Lucee 7 engine, scope dumps fail to render, limiting disclosure to header fields. This is fixed in 4.1.2.

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