What’s Vulnerable › Vulnerabilities

CVE-2026-44839: RabbitMQ: Unsanitized vhost names allow for XSS in management UI

• Severity: medium (CVSS 4.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-27 · updated 2026-10-26
• Weakness: CWE-80

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.

Affected products

• rabbitmq-server: from 3.7.0 before 4.0.13; from 4.1.0 before 4.1.2 — fixed in 4.0.13, 4.1.2

How to fix

Upgrade to a fixed version: rabbitmq-server 4.0.13, 4.1.2. Check the vendor advisory for mitigations.

References

• https://github.com/rabbitmq/rabbitmq-server/commit/7f54319279d1ece161ae0b4cdc6f0e58a4045eb5
• https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-fh5r-jpm3-fjwp

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