The RabbitMQ Java client library allows Java and JVM-based applications to connect to and interact with RabbitMQ nodes. Prior to 5.33.1, src/main/java/com/rabbitmq/client/impl/ValueReader.java permits ValueReader.readTable and ValueReader.readArray to call ValueReader.readFieldValue recursively for AMQP table type F and AMQP array type A values without a nesting-depth limit. A malicious AMQP server or network intermediary can send approximately 580 nested table levels in the pre-authentication connection.start frame, fitting within the default 131072-byte frame maximum, to trigger StackOverflowError. The error terminates the client input processing thread and causes denial of service. This issue is fixed in version 5.33.1.
https://github.com/rabbitmq/rabbitmq-java-client/security/advisories/GHSA-93j5-89vc-pph4
https://github.com/rabbitmq/rabbitmq-java-client/releases/tag/v5.33.1
https://github.com/rabbitmq/rabbitmq-java-client/pull/2008
https://github.com/rabbitmq/rabbitmq-java-client/pull/2007
https://github.com/rabbitmq/rabbitmq-java-client/commit/db89e34809fbc6ba4e946615f297f3684ccd0acc
https://github.com/rabbitmq/rabbitmq-java-client/commit/09af76fce136f3136931654a0a1d43095c80e2f0
Published: 2026-08-18
Updated: 2026-08-18
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
Severity: Medium
Base Score: 7.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Severity: High
Base Score: 8.7
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Severity: High