Medium severity · published May 27, 2026
CVE-2026-44839
RabbitMQ: Unsanitized vhost names allow for XSS in management UI
4.8
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RA
rabbitmq-server · rabbitmq
>= 3.7.0, < 4.0.13; >= 4.1.0-alpha, < 4.1.2 · source: vendor
RS
Rabbitmq Server · Broadcom
3.7.0 before 4.0.13; 4.1.0 before 4.1.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-44839
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-44839
Patch
https://github.com/rabbitmq/rabbitmq-server/commit/7f54319279d1ece161ae0b4cdc6f0e58a4045eb5
Patch
https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-fh5r-jpm3-fjwp
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