CVE-2026-67414
RabbitMQ is a messaging and streaming broker.
Published Oct 14, 2026 · updated Oct 15, 2026
RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.24, 4.1.15, 4.2.10, and 4.3.4, deps/amqp10_common/src/amqp10_binary_parser.erl materializes each element of AMQP 1.0 arrays whose shared constructor has zero width, while limiting only the number of elements in each array and not the aggregate arrays in a frame. After completing SASL authentication, a low-privilege client can send an ordinary frame containing many individually permitted arrays, causing a small frame to expand into a very large reader-process heap before later frame validation or authorization. Because deps/rabbit/src/rabbit_amqp_reader.erl clears the pre-authentication max_heap_size guard after login, repeated or concurrent frames can trigger the node-wide memory alarm, block publishers, or exhaust broker memory. This issue is fixed in versions 4.0.24, 4.1.15, 4.2.10, and 4.3.4.
Timeline
Detection, updates, and resolution for this record.
Oct 14, 2026 · NIST NVD
Detected
RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.24, 4.1.15, 4.2.10, and 4.3.4, deps/amqp10_common/src/amqp10_binary_parser.erl materializes each element of AMQP 1.0 arrays whose shared constructor has zero width, while limiting only the number of elements in each array and not the aggregate arrays in a frame. After completing SASL authentication, a low-privilege client can send
Oct 15, 2026 · OSV.dev
Fix available
rabbitmq-server fixed in 4.3.6-1
Oct 15, 2026 · OSV.dev
Fix available
rabbitmq-server fixed in 4.3.6-1
Oct 15, 2026 · OSV.dev
Updated
RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.24, 4.1.15, 4.2.10, and 4.3.4, deps/amqp10_common/src/amqp10_binary_parser.erl materializes each element of AMQP 1.0 arrays whose shared constructor has zero width, while limiting only the number of elements in each array and not the aggregate arrays in a frame. After completing SASL authentication, a low-privilege client can send
Affected
- Debian:12 rabbitmq-server3.10.8-1.1, 3.10.8-1.1+deb12u1, 3.10.8-2
- Debian:13 rabbitmq-server4.0.5-10, 4.0.5-11, 4.0.5-12
- Debian:14 rabbitmq-server0 → 4.3.6-1
Sources
- CVE.orgCVE-2026-67414
Official CVE identifier
cve.org - NIST NVDCVE-2026-67414
RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.24, 4.1.15, 4.2.10, and 4.3.4, deps/amqp10_common/src/amqp10_binary_parser.erl materializes each element of AMQP 1.0 arrays whose shared constructor has zero width, while limiting only the number of elements in ea
nvd.nist.gov - OSV.devDEBIAN-CVE-2026-67414osv.dev