---
id: CVE-2026-67239
title: RabbitMQ is a messaging and streaming broker
summary: >-
  RabbitMQ is a messaging and streaming broker. From 3.13.0 until 3.13.18 and
  4.0.23 and 4.1.14 and 4.2.9 and 4.3.3, Stored XSS via TLS peer-certificate DN
  in stream-management UI (sibling of V-11). lines 102/106/110 render
  peercertsubject…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: broadcom
product: rabbitmq_server
affected:
  - 'rabbitmq_server >= 3.13.0, < 3.13.18'
  - 'rabbitmq_server >= 4.0.0, < 4.0.23'
  - 'rabbitmq_server >= 4.1.0, < 4.1.14'
  - 'rabbitmq_server >= 4.2.0, < 4.2.9'
  - 'rabbitmq_server >= 4.3.0, < 4.3.3'
patched:
  - rabbitmq_server 4.3.3
published: '2026-09-25'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T16:32:42.213'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67239'
references:
  - url: 'https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.9'
    label: security-advisories@github.com
  - url: 'https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.3'
    label: security-advisories@github.com
  - url: >-
      https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-xm9p-57xv-vxwc
    label: security-advisories@github.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-67239.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-67239'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2541513'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-67239'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67239'
  - url: 'https://access.redhat.com/errata/RHSA-2026:67552'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.00154
epssPercentile: 0.04499
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-25T16:44:00.484727Z'
scores:
  nvd: 5.4
  cna: 7.6
  vendor: 4.7
ingestedAt: '2026-09-25T17:13:14.016Z'
---

## Overview

RabbitMQ is a messaging and streaming broker. From 3.13.0 until 3.13.18 and 4.0.23 and 4.1.14 and 4.2.9 and 4.3.3, Stored XSS via TLS peer-certificate DN in stream-management UI (sibling of V-11). lines 102/106/110 render peercertsubject / peercertissuer with raw <%= %> and no fmtstring(). RFC4514 backslash-escaping of </> is HTML-inert and bypassable (<img ... //>). Requires non-default config: a stream TLS listener with verifypeer and an attacker-obtainable trusted cert with a malicious Same as the connection.ejs finding, against operators viewing the stream-connection detail rabbitmqstream + rabbitmqstreammanagement enabled with a TLS listener using verifypeer Attacker can obtain a certificate signed by a CA the listener trusts, with attacker-chosen DN An operator views the. This issue is fixed in versions 3.13.18 and 4.0.23 and 4.1.14 and 4.2.9 and 4.3.3.

## Affected

- `rabbitmq_server >= 3.13.0, < 3.13.18`
- `rabbitmq_server >= 4.0.0, < 4.0.23`
- `rabbitmq_server >= 4.1.0, < 4.1.14`
- `rabbitmq_server >= 4.2.0, < 4.2.9`
- `rabbitmq_server >= 4.3.0, < 4.3.3`

## Remediation

Upgrade past the affected range:

- `rabbitmq_server 4.3.3`

## Vendor advisories

- **RHSA-2026:67552** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:67552)
- **Red Hat VEX** · Moderate · affected: Red Hat Hardened Images, Red Hat OpenStack Platform 13 (Queens), Red Hat OpenStack Platform 16.2, Red Hat OpenStack Platform 17.1, Red Hat OpenStack Platform 18.0 · no fix planned: Red Hat OpenStack Platform 13 (Queens), Red Hat OpenStack Platform 16.2, Red Hat OpenStack Platform 17.1, Red Hat Hardened Images, … · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-67239.json)