{"id":"CVE-2026-67223","published":"2026-09-25T17:17:10.670","lastModified":"2026-09-28T14:38:38.163","description":"RabbitMQ is a messaging and streaming broker. The advisory establishes affected 3.13, 4.0, 4.1, 4.2, and 4.3 maintenance lines but contains conflicting first-fixed versions for the 3.13, 4.0, and 4.1 lines. fill/2 substitutes ${username} into user_dn_pattern without RFC 4514 DN escaping, allowing a crafted username to alter the LDAP bind DN and potentially select a different directory entry. Exploitation requires rabbitmq_auth_backend_ldap with a user_dn_pattern containing ${username}, a directory layout in which the injected suffix resolves usefully, and a password valid for the resulting DN. The advisory body identifies 3.13.15, 4.0.20, 4.1.11, 4.2.9, and 4.3.3 as fixed, while structured metadata identifies 3.13.18, 4.0.23, 4.1.14, 4.2.9, and 4.3.3. No fixed-version assertion is certifiable until a curator resolves this conflict.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":["CWE-90"],"vendors":[],"products":[],"references":[{"url":"https://github.com/rabbitmq/rabbitmq-server/commit/ad3ca47accd313a4a0dbcbbe17bf60fc8f4b2614","tags":[]},{"url":"https://github.com/rabbitmq/rabbitmq-server/commit/b54056e59b7fd3a2d7f07dfaba95f026e138eee8","tags":[]},{"url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.9","tags":[]},{"url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.3","tags":[]},{"url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-9x7r-g78c-5835","tags":[]}],"exploitRefs":[{"url":"https://github.com/rabbitmq/rabbitmq-server/commit/ad3ca47accd313a4a0dbcbbe17bf60fc8f4b2614","tags":[]},{"url":"https://github.com/rabbitmq/rabbitmq-server/commit/b54056e59b7fd3a2d7f07dfaba95f026e138eee8","tags":[]},{"url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.9","tags":[]},{"url":"https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.3","tags":[]},{"url":"https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-9x7r-g78c-5835","tags":[]}],"hasPoc":true,"ai":null}