10

CVE-2026-57216: broadcom rabbitmq_server Improper Authentication

CVSS: 10.0v3.1CriticalAnalyzed
AliasesUBUNTU-CVE-2026-57216DEBIAN-CVE-2026-57216CGA-hwp5-r259-68gc
Published 10-07-2026Last modified 13-07-2026
Open JSON

Vulnerability summary

CVE-2026-57216 is a critical (CVSS 10.0) Improper Authentication vulnerability in broadcom rabbitmq_server. EPSS estimates a 0.50% chance of exploitation in the next 30 days, higher than 41.7% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
90/100
0100
Critical · default modelHow is this calculated?
CVSS score
10.0/10
010
Critical · v3.1 (NVD)
EPSS score
0.50%
0%100%
Low · -0.38 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 5 · Related 3
OPENSUSE-SU-2026:21903-1RHSA-2026:35939RHSA-2026:35940SUSE-SU-2026:23859-1SUSE-SU-2026:23869-1

Timeline

  1. 10-07-2026
    PublishedVulnerability first disclosed.
  2. 13-07-2026
    Last modifiedVulnerability information updated.

Description

RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.20, 4.1.11, and 4.2.6, AMQP 0-9-1, AMQP 1.0, and Stream Protocol authentication can allow a loopback-restricted user such as guest to connect remotely when traffic is accepted through a trusted PROXY-protocol path and the backend listener is loopback-bound because the loopback check uses the listener-side socket address instead of the real client source. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.50%

Chance of exploitation in the next 30 days

Percentile

42%

Versus all other CVEs

30-day change

-0.38 pp

From 0.89% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.50%

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

Chainguard6 products
  • rabbitmq-server-4.1All versions (No fix recorded)
  • rabbitmq-server-4.1-docAll versions (No fix recorded)
  • rabbitmq-server-4.1-iamguarded-compatAll versions (No fix recorded)
  • rabbitmq-server-fips-4.1All versions (No fix recorded)
  • rabbitmq-server-fips-4.1-docAll versions (No fix recorded)
Broadcom1 product
  • rabbitmq_server≥ 3.13.0, < 3.13.15 | ≥ 4.0.0, < 4.0.20 | ≥ 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≥ 4.2.0, < 4.2.6 | ≥ 4.1.0, < 4.1.11 | ≥ 4.0.0, < 4.0.21 | ≥ 3.13.0, < 3.13.15
Ubuntu1 product
  • rabbitmq-serverAll versions (No fix recorded)
Wolfi1 product
  • rabbitmq-server-4.1All versions (No fix recorded)

6 vendors · 11 products

References

11 links
Show all 11 references