Cross-site scripting in RabbitMQ - CVE-2026-57214
Published: June 18, 2026
Vulnerability identifier: #VU134805
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-57214
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary JavaScript in the browser of another user.
The vulnerability exists due to cross-site scripting in the RabbitMQ management UI queue and exchange listing pages when rendering the x-internal-purpose queue or exchange argument into an HTML title attribute. A remote user can declare a queue or exchange with a crafted x-internal-purpose value to execute arbitrary JavaScript in the browser of another user.
The payload is stored in queue or exchange metadata and is triggered when a user views the Queues or Exchanges page.
Affected software
RabbitMQ
How to mitigate CVE-2026-57214
Install security update from vendor's website.
RabbitMQ - update to 4.2.5