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Fencer Vulns
medium 4.8

CVE-2026-44839 json

RabbitMQ: Unsanitized vhost names allow for XSS in management UI

published 2026-05-27 5 mo ago modified 2026-10-26 14 d ago also BIT-rabbitmq-2026-44839 , EUVD-2026-32549 , GHSA-fh5r-jpm3-fjwp

cvss
4.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 7%
public exploits
0
none known

Summary

RabbitMQ is a messaging and streaming broker. From 3.7.0 to before 4.1.2 and 4.0.13, This vulnerability is fixed in 4.1.2 and 4.0.13.

Patch / fix

  • bitnami rabbitmq 4.0.13, 4.1.2
  • broadcom rabbitmq_server 4.0.13, 4.1.2
  • pivotal_software rabbitmq 4.0.13, 4.1.2
  • vmware rabbitmq 4.0.13, 4.1.2
  • rabbitmq-server Debian 14 4.3.0-2

debian advisories DEBIAN-CVE-2026-44839

  • rabbitmq-server4.3 hummingbird 1 4.3.6-1.hum1

red hat advisories RHSA-2026:67552

  • rabbitmq-server SLES 16.0, SLES for SAP applications 16.0 4.1.5-160000.2.1

suse advisories SUSE-SU-2026:23859-1SUSE-SU-2026:23869-1

  • rabbitmq-server openSUSE Leap 16.0 4.1.5-160000.2.1

opensuse advisories openSUSE-SU-2026:21903-1

  • rabbitmq-server Azure Linux 3.0 3.13.7-8

azure linux advisories AZL-89289

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-44839 updated cvss 3.5

rabbitmq-server: RabbitMQ: Unsanitized vhost names allow for XSS in management UI

  • Red Hat Hardened Images rabbitmq-server4.2 Red Hat OpenStack Platform 16.2 rabbitmq-server Red Hat OpenStack Platform 17.1 rabbitmq-server Red Hat OpenStack Platform 18.0 rabbitmq-server
    affected: workaround, no fix available “To mitigate this issue, restrict access to the RabbitMQ management UI to trusted administrators only. Ensure that administrative interfaces are not exposed to untrusted networks.”
  • Red Hat Hardened Images rabbitmq-server4.3 4.3.6-1.hum1
    fixed: vendor fix “To mitigate this issue, restrict access to the RabbitMQ management UI to trusted administrators only. Ensure that administrative interfaces are not exposed to untrusted networks.” RHSA-2026:67552

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
5 mo ago

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 5.6 CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CNA 4.0 5.6 CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD 3.1 4.8 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
bitnami rabbitmq
>=3.7.0, <4.0.13
>=4.1.0, <4.1.2
4.0.13
4.1.2

Affected products

  • rabbitmq rabbitmq-server

Classification

Weakness
  • CWE-80 Improper Neutralization of Script-Related HTML Tags in a Web Page

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.