{"id":"CVE-2026-57216","summary":"RabbitMQ: AMQP 1.0, AMQP 0-9-1, Stream Protocol loopback enforcement can lead to remote guest sessions due to listener-address loopback checks","details":"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.","aliases":["GHSA-36m6-588r-vqcw"],"modified":"2026-08-12T03:51:16.151329320Z","published":"2026-07-10T20:20:33.269Z","database_specific":{"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"}]},"references":[{"type":"WEB","url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.6"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57216.json"},{"type":"ADVISORY","url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-36m6-588r-vqcw"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-57216"},{"type":"FIX","url":"https://github.com/rabbitmq/rabbitmq-server/commit/7273c9eb6920abcde17b892dbe97ccaf906ead47"},{"type":"FIX","url":"https://github.com/rabbitmq/rabbitmq-server/commit/9f8c39fcf0acbc43080ee7017a62a02832114112"},{"type":"FIX","url":"https://github.com/rabbitmq/rabbitmq-server/pull/15936"},{"type":"FIX","url":"https://github.com/rabbitmq/rabbitmq-server/pull/15940"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/rabbitmq/rabbitmq-server","events":[{"introduced":"c73bcd30fcadd77f3ec354c686f969fc971ac940"},{"fixed":"8a56c37f099a7bf609a555de3f0ff8ed23964d20"},{"fixed":"7273c9eb6920abcde17b892dbe97ccaf906ead47"},{"fixed":"9f8c39fcf0acbc43080ee7017a62a02832114112"}],"database_specific":{"source":["CPE_RANGE","REFERENCES"],"cpe":"cpe:2.3:a:broadcom:rabbitmq_server:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"3.13.0"},{"fixed":"4.2.6"}]}}],"versions":["v4.2.5","v4.2.4","v4.2.3","v4.2.2","v4.2.1","v4.2.0","v4.2.0-rc.1","v4.2.0-beta.4","v4.2.0-beta.3","v4.2.0-beta.2","v4.2.0-beta.1","v4.1.0-beta.4","v4.1.0-beta.3","v4.1.0-beta.2","v4.1.0-beta.1","v4.1.0-alpha","v3.13.0-rc.6","v3.13.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-57216.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N"}]}