CVE-2026-67405 RabbitMQ: CSWSH on Web-STOMP / Web-MQTT (no Origin validation)

RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0, Neither the Web-MQTT handler deps/rabbitmqwebmqtt/src/rabbitwebmqtthandler.erl:104 nor the Web-STOMP handler deps/rabbitmqwebstomp/src/rabbitwebstomphandler.erl:102 validates the Origin head...

EUVD-2026-85655

RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1, isauthorized/2 for the /federation-links/.../restart route uses isauthorizedmonitor accepts the monitoring tag, while allowedmethods permits DELETE and deleteresource/2 triggers...

CVE-2026-66075

RabbitMQ versions prior to 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1 are vulnerable to a privilege escalation issue. The /federation-links/.../restart route incorrectly uses is_authorized_monitor, which accepts the monitoring tag , while allowing the DELETE method. Because there is no per-method ...

CVE-2026-66075 RabbitMQ: Monitoring-tag user can restart federation links

RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1, isauthorized/2 for the /federation-links/.../restart route uses isauthorizedmonitor accepts the monitoring tag, while allowedmethods permits DELETE and deleteresource/2 triggers...

CVE-2026-66075

RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1, isauthorized/2 for the /federation-links/.../restart route uses isauthorizedmonitor accepts the monitoring tag, while allowedmethods permits DELETE and deleteresource/2 triggers...

CVE-2026-66075 RabbitMQ: Monitoring-tag user can restart federation links

RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1, isauthorized/2 for the /federation-links/.../restart route uses isauthorizedmonitor accepts the monitoring tag, while allowedmethods permits DELETE and deleteresource/2 triggers...

CVE-2026-66075 RabbitMQ: Monitoring-tag user can restart federation links

RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1, isauthorized/2 for the /federation-links/.../restart route uses isauthorizedmonitor accepts the monitoring tag, while allowedmethods permits DELETE and deleteresource/2 triggers...

CVE-2026-67219

RabbitMQ is affected by a vulnerability where the add_binding/3 function fails to impose an upper bound on the routing key integer weight N in the consistent-hash exchange plugin. Because validate_binding/2 only ensures N >= 1 , an attacker with write permissions on a consistent-hash exchange ...

CVE-2026-67219 RabbitMQ: Consistent-hash exchange unbounded weight

RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0, addbinding/3 parses the routing key as an integer weight N and computes ring positions with lists:seqNextN0, NextN0 + N - 1. validatebinding/2 only checks N = 1 , no upper bound. The resulti...

CVE-2026-67219 RabbitMQ: Consistent-hash exchange unbounded weight

RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0, addbinding/3 parses the routing key as an integer weight N and computes ring positions with lists:seqNextN0, NextN0 + N - 1. validatebinding/2 only checks N = 1 , no upper bound. The resulti...

CVE-2026-67219

RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.0, addbinding/3 parses the routing key as an integer weight N and computes ring positions with lists:seqNextN0, NextN0 + N - 1. validatebinding/2 only checks N = 1 , no upper bound. The resulti...

CVE-2026-67228 RabbitMQ: Atom exhaustion: to_atom on runtime-parameter component

RabbitMQ is a messaging and streaming broker. Prior to versions 4.2.7 and 4.3.1, The runtime-parameters lookup path coerces the URL :component segment to an atom with rabbitdatacoercion:toatom/1 in lookupcomponent/1 deps/rabbit/src/rabbitruntimeparameters.erl, creating a new atom for any previous...

CVE-2026-67228 RabbitMQ: Atom exhaustion: to_atom on runtime-parameter component

RabbitMQ is a messaging and streaming broker. Prior to versions 4.2.7 and 4.3.1, The runtime-parameters lookup path coerces the URL :component segment to an atom with rabbitdatacoercion:toatom/1 in lookupcomponent/1 deps/rabbit/src/rabbitruntimeparameters.erl, creating a new atom for any previous...

CVE-2026-67228

RabbitMQ versions prior to 4.2.7 and 4.3.1 are vulnerable to an atom exhaustion attack in the runtime-parameters lookup path. The lookup_component/1 function in deps/rabbit/src/rabbit_runtime_parameters.erl incorrectly uses rabbit_data_coercion:to_atom/1 to process the :component segment of a req...

CVE-2026-67228

RabbitMQ is a messaging and streaming broker. Prior to versions 4.2.7 and 4.3.1, The runtime-parameters lookup path coerces the URL :component segment to an atom with rabbitdatacoercion:toatom/1 in lookupcomponent/1 deps/rabbit/src/rabbitruntimeparameters.erl, creating a new atom for any previous...

EUVD-2026-85653

RabbitMQ is a messaging and streaming broker. Prior to versions 4.2.7 and 4.3.1, The runtime-parameters lookup path coerces the URL :component segment to an atom with rabbitdatacoercion:toatom/1 in lookupcomponent/1 deps/rabbit/src/rabbitruntimeparameters.erl, creating a new atom for any previous...

CVE-2026-67235

RabbitMQ is a messaging and streaming broker. Prior to versions 4.3.0, 4.2.6, 4.1.11, 4.0.20, and 3.13.15, The content-header BodySize a uint64 was stored without validation against maxmessagesize. The size check ran only when assembly completed. By declaring bodysize = 2^63-1 and then streaming...

CVE-2026-67235 RabbitMQ: AMQP 0-9-1 body assembly never validates accumulated size

RabbitMQ is a messaging and streaming broker. Prior to versions 4.3.0, 4.2.6, 4.1.11, 4.0.20, and 3.13.15, The content-header BodySize a uint64 was stored without validation against maxmessagesize. The size check ran only when assembly completed. By declaring bodysize = 2^63-1 and then streaming...

CVE-2026-67235 RabbitMQ: AMQP 0-9-1 body assembly never validates accumulated size

RabbitMQ is a messaging and streaming broker. Prior to versions 4.3.0, 4.2.6, 4.1.11, 4.0.20, and 3.13.15, The content-header BodySize a uint64 was stored without validation against maxmessagesize. The size check ran only when assembly completed. By declaring bodysize = 2^63-1 and then streaming...

CVE-2026-67235

The messaging and streaming broker RabbitMQ is vulnerable to a memory exhaustion flaw in versions prior to 4.3.0, 4.2.6, 4.1.11, 4.0.20, and 3.13.15 . The AMQP 0-9-1 protocol's body assembly process fails to validate the BodySize content-header against max_message_size until assembly is complete....