---
id: CVE-2026-81303
title: A flaw was found in hawtio-operator
summary: >-
  A flaw was found in hawtio-operator. The operator holds
  routes/custom-host:create permission cluster-wide and writes the
  tenant-supplied spec.routeHostName value from the Hawtio custom resource
  directly into the Route spec without valida…
severity: medium
cvss: 6.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N'
cwe:
  - CWE-441
vendor: Red Hat
product: rhbac-4/hawtio-operator-bundle
affected:
  - rhbac-4/hawtio-operator-bundle (all versions)
  - rhbac-4/hawtio-rhel9 (all versions)
published: '2026-09-15'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T19:42:43.623'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-81303'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-81303'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2524897'
    label: secalert@redhat.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-81303.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-81303'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-81303'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00273
epssPercentile: 0.1994
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-15T17:50:38.786528Z'
ingestedAt: '2026-09-15T06:32:35.355Z'
---

## Overview

A flaw was found in hawtio-operator. The operator holds routes/custom-host:create permission cluster-wide and writes the tenant-supplied spec.routeHostName value from the Hawtio custom resource directly into the Route spec without validation or authorization checks. A namespace edit user, who normally cannot set custom Route hostnames, can use the operator as a confused deputy to claim arbitrary externally-routable hostnames, enabling subdomain takeover and, in combination with the auto-grant OAuthClient, OAuth redirect hijack.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat build of Apache Camel - HawtIO 4 · no fix planned: Red Hat build of Apache Camel - HawtIO 4 · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-81303.json)