Vulnerability · Published May 27, 2026 · Assigned by GitHub_M
CVE-2026-44839RabbitMQ: Unsanitized vhost names allow for XSS in management UI
Medium 5.6
In plain English
A medium-severity security flaw in rabbitmq-server from rabbitmq. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)5.6Medium
Exploit odds (30 days)0.2%top 92.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | rabbitmq-server | no fix listed | DEBIAN-CVE-2026-44839 |
| Debian:13 | rabbitmq-server | no fix listed | DEBIAN-CVE-2026-44839 |
| Debian:14 | rabbitmq-server | 4.3.0-2 | DEBIAN-CVE-2026-44839 |
| Ubuntu:22.04:LTS | broker | no fix listed | UBUNTU-CVE-2026-44839 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| rabbitmq | rabbitmq-server | >= 3.7.0, < 4.0.13>= 4.1.0-alpha, < 4.1.2 |
Weakness: CWE-80 · Vector: 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