---
id: CVE-2026-67415
title: RabbitMQ is a messaging and streaming broker
summary: >-
  RabbitMQ is a messaging and streaming broker. From 4.2.0 until 4.2.9 and
  4.3.3, the Shovel parameter parser converted attacker-controlled runtime
  parameter values into non-garbage-collected Erlang atoms before bounding them
  or checking a…
severity: medium
cvss: 4.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-400
  - CWE-770
vendor: broadcom
product: rabbitmq_server
affected:
  - '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: '2026-10-16T15:58:47.150'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67415'
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-8mpg-qw9r-m5cr
    label: security-advisories@github.com
  - url: >-
      https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-8mpg-qw9r-m5cr
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-67415.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-67415'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2541530'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-67415'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67415'
  - url: 'https://access.redhat.com/errata/RHSA-2026:67552'
tags:
  - nvd
  - cve.org
  - exploit-available
  - csaf
  - vex
  - red-hat
epss: 0.00383
epssPercentile: 0.3217
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-25T19:59:31.171216Z'
scores:
  nvd: 4.9
  cna: 5.9
  vendor: 4.9
ingestedAt: '2026-09-25T17:13:14.024Z'
---

## Overview

RabbitMQ is a messaging and streaming broker. From 4.2.0 until 4.2.9 and 4.3.3, the Shovel parameter parser converted attacker-controlled runtime parameter values into non-garbage-collected Erlang atoms before bounding them or checking a fixed allowlist. Exploitation requires network access to the Management HTTP API, valid credentials with both the management and policymaker tags, permission to set Shovel runtime parameters on a vhost, and the rabbitmq_shovel and rabbitmq_shovel_management plugins to be enabled. The attacker can exhaust the node-wide atom table and deny service, and malicious parameters are stored durably and reparsed when workers start, so atom pressure can recur after restart without a live attacker connection. This issue is fixed in versions 4.2.9 and 4.3.3.

## Affected

- `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-2026-67415.json)