RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.20, 4.1.11, and 4.2.6, AMQP 0-9-1, AMQP 1.0, and Stream Protocol authentication can allow a loopback-restricted user such as guest to connect remotely when traffic is accepted through a trusted PROXY-protocol path and the backend listener is loopback-bound because the loopback check uses the listener-side socket address instead of the real client source. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-287"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57216.json",
"unresolved_ranges": [
{
"extracted_events": [
{
"introduced": "4.1.0"
},
{
"fixed": "4.1.11"
},
{
"introduced": "4.0.0"
},
{
"fixed": "4.0.21"
},
{
"introduced": "3.13.0"
},
{
"fixed": "3.13.15"
}
],
"source": "AFFECTED_FIELD"
}
]
}