7.6

CVE-2026-67239: broadcom rabbitmq_server Cross-site Scripting

CVSS: 7.6v4.0HighAnalyzed
AliasesUBUNTU-CVE-2026-67239DEBIAN-CVE-2026-67239
Published 25-09-2026Last modified 25-09-2026
Open JSON

Vulnerability summary

CVE-2026-67239 is a high (CVSS 7.6) Cross-site Scripting vulnerability in broadcom rabbitmq_server. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 4.3% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.6/10
010
High · v4.0 (CVE.org)
EPSS score
0.16%
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 2 · Related 1
RHSA-2026:67552USN-8933-1

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 and 4.0.23 and 4.1.14 and 4.2.9 and 4.3.3, Stored XSS via TLS peer-certificate DN in stream-management UI (sibling of V-11). lines 102/106/110 render peercertsubject / peercertissuer with raw <%= %> and no fmtstring(). RFC4514 backslash-escaping of </> is HTML-inert and bypassable (<img ... //>). Requires non-default config: a stream TLS listener with verifypeer and an attacker-obtainable trusted cert with a malicious Same as the connection.ejs finding, against operators viewing the stream-connection detail rabbitmqstream + rabbitmqstreammanagement enabled with a TLS listener using verifypeer Attacker can obtain a certificate signed by a CA the listener trusts, with attacker-chosen DN An operator views the. This issue is fixed in versions 3.13.18 and 4.0.23 and 4.1.14 and 4.2.9 and 4.3.3.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

26-09-202619-10-2026
EPSS score
0.16%

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, < 3.13.18 | ≥ 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≥ 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
Ubuntu1 product
  • rabbitmq-serverAll versions (No fix recorded) | < 3.5.7-1ubuntu0.16.04.4+esm3 | < 3.6.10-1ubuntu0.5+esm1 | < 3.8.3-0ubuntu0.3+esm2 | < 3.9.27-0ubuntu0.6 | < 3.12.1-1ubuntu1.7 | < 4.0.5-10ubuntu5.2

4 vendors · 4 products

References

7 links