6.5

CVE-2026-67218: broadcom rabbitmq_server Missing Authorization

CVSS: 6.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-67218DEBIAN-CVE-2026-67218
Published 23-09-2026Last modified 24-09-2026
Open JSON

Vulnerability summary

CVE-2026-67218 is a medium (CVSS 6.5) Missing Authorization vulnerability in broadcom rabbitmq_server. EPSS estimates a 0.34% chance of exploitation in the next 30 days, higher than 25.4% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.34%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1
RHSA-2026:67552

Timeline

  1. 23-09-2026
    PublishedVulnerability first disclosed.
  2. 24-09-2026
    Last modifiedVulnerability information updated.

Description

RabbitMQ is a messaging and streaming broker. Prior to versions 4.0.22, 4.1.11, 4.2.6, and 4.3.0, accept_content/2 at line 56 calls rabbit_stream_manager:create_super_stream/... directly after is_authorized (which only checks the management tag + vhost access via is_authorized_vhost). The stream-protocol equivalent (rabbit_stream_reader.erl create_super_stream handler) calls rabbit_stream_utils:check_super_stream_management_permitted/4 which enforces configure on the exchange and each partition queue. The HTTP handler omits this call entirely. A user with management tag and vhost access , but no configure permission on any resource , can create super-streams (an exchange + N partition stream queues + bindings) via the HTTP API. The native stream-protocol path enforces configure on each resource; the HTTP path does not, creating a privilege escalation from 'can view' to 'can create persistent cluster-wide resources.' Preconditions include rabbitmq_stream_management plugin enabled management tag + vhost access (no resource permissions needed). This issue is fixed in versions 4.0.22, 4.1.11, 4.2.6, and 4.3.0.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.34%

Chance of exploitation in the next 30 days

Percentile

25%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

24-09-202619-10-2026
EPSS score
0.34%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Broadcom1 product
  • rabbitmq_server≥ 4.0.0, < 4.0.22 | ≥ 4.1.0, < 4.1.11 | ≥ 4.2.0, < 4.2.6
Debian1 product
  • rabbitmq-serverAll versions (No fix recorded) | < 4.3.0-2
Rabbitmq1 product
  • rabbitmq-server≥ 4.0.0, < 4.0.22 | ≥ 4.1.0, < 4.1.11 | ≥ 4.2.0, < 4.2.6
Ubuntu1 product
  • rabbitmq-serverAll versions (No fix recorded)

4 vendors · 4 products

References

6 links