6.5

CVE-2026-66072: broadcom rabbitmq_server Uncontrolled Resource Consumption

CVSS: 6.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-66072DEBIAN-CVE-2026-66072
Published 23-09-2026Last modified 24-09-2026
Open JSON

Vulnerability summary

CVE-2026-66072 is a medium (CVSS 6.5) Uncontrolled Resource Consumption vulnerability in broadcom rabbitmq_server. EPSS estimates a 0.33% chance of exploitation in the next 30 days, higher than 24.6% 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
0.33%
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 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1, get_chunk_selector/1 calls binary_to_atom on the raw client-supplied <<"chunk_selector">> property from post-auth subscribe and resolve_offset_spec frames, with no whitelist and no existing guard. An authenticated stream client with read access to any stream can crash the broker node. Preconditions include rabbitmq_stream plugin enabled Authenticated stream-protocol user with read access to at least one stream. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.33%

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
0.33%

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≥ 3.13.0, < 3.13.15 | ≥ 4.0.0, < 4.0.20 | ≥ 4.1.0, < 4.1.11 | ≥ 4.2.0, < 4.2.6 | ≥ 4.3.0, < 4.3.1
Debian1 product
  • rabbitmq-serverAll versions (No fix recorded) | < 4.3.2-1
Rabbitmq1 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 | ≥ 4.3.0, < 4.3.1
Ubuntu1 product
  • rabbitmq-serverAll versions (No fix recorded)

4 vendors · 4 products

References

6 links