7.1

CVE-2026-67411: broadcom rabbitmq_server Incorrect Authorization

CVSS: 7.1v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-67411DEBIAN-CVE-2026-67411
Published 25-09-2026Last modified 25-09-2026
Open JSON

Vulnerability summary

CVE-2026-67411 is a high (CVSS 7.1) Incorrect Authorization vulnerability in broadcom rabbitmq_server. EPSS estimates a 0.32% chance of exploitation in the next 30 days, higher than 23.2% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
38/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.1/10
010
High · v3.1 (NVD)
EPSS score
0.32%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 1
RHSA-2026:67552

Timeline

  1. 25-09-2026
    PublishedVulnerability first disclosed.
  2. 25-09-2026
    Last modifiedVulnerability information updated.

Description

RabbitMQ is a messaging and streaming broker. From 3.13.0 until 3.13.18, 4.0.23, 4.1.14, 4.2.9, and 4.3.3, native MQTT and MQTT over WebSocket behind a trusted PROXY Protocol frontend could lose the proxy-derived client address before the MQTT authentication path checked loopback_users, causing the frontend-to-broker address to be treated as loopback. An attacker who can reach the trusted frontend and has valid credentials for a loopback-restricted account can therefore bypass the source-address restriction; the issue does not bypass password authentication. This issue is fixed in versions 3.13.18, 4.0.23, 4.1.14, 4.2.9, and 4.3.3.

CVSS metrics

6 scores · 4 sources · 2 versions

EPSS trend

Probability

0.32%

Chance of exploitation in the next 30 days

Percentile

23%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

26-09-202619-10-2026
EPSS score
0.32%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Rabbitmq Server

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Broadcom1 product
  • rabbitmq_server≥ 3.13.0, < 3.13.18 | ≥ 4.0.0, < 4.0.23 | ≥ 4.1.0, < 4.1.14 | ≥ 4.2.0, < 4.2.9 | ≥ 4.3.0, < 4.3.3
Debian1 product
  • rabbitmq-serverAll versions (No fix recorded) | < 4.3.6-1
Rabbitmq1 product
  • rabbitmq-server≥ 4.3.0, < 4.3.3 | ≥ 4.2.0, < 4.2.9 | ≥ 4.1.0, < 4.1.14 | ≥ 4.0.0, < 4.0.23 | ≥ 3.13.0, < 3.13.18
Ubuntu1 product
  • rabbitmq-serverAll versions (No fix recorded)

4 vendors · 4 products

References

8 links