CVE-2026-69220 RabbitMQ Java client ValueReader: Unbounded recursive table/array nesting causes StackOverflowError DoS
A malicious AMQP server can cause a StackOverflowError in the RabbitMQ Java client, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-69220?
CVE-2026-69220 is a high-severity denial of service vulnerability in rabbitmq-java-client, published on 18 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-674
Which versions are affected by CVE-2026-69220?
2 open source packages ship an affected version, including com.rabbitmq:amqp-client.
| Package | Affected | Fixed in |
|---|---|---|
com.rabbitmq:amqp-client Maven | All versions | 5.33.1 |
com.rabbitmq:amqp-client Maven | All versions | 5.33.1 |
How do I fix CVE-2026-69220?
Upgrade com.rabbitmq:amqp-client to 5.33.1 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-69220 being exploited?
There is no known exploitation of CVE-2026-69220 in the wild and no public exploit code.
Sources
Also known as CLEANSTART-2026-OM34556, DEBIAN-CVE-2026-69220, ECHO-c1b2-abe7-d717, GHSA-93j5-89vc-pph4, MINI-237x-2m6x-phqg, MINI-5rh9-c4cp-32w6 and 15 more.