RabbitMQ Java client accepts broker frames larger than the negotiated AMQP frame_max
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Attack requirements
- Present
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.
Summary
The RabbitMQ Java client library allows Java and JVM-based applications to connect to and interact with RabbitMQ nodes. Prior to 5.33.0, the AMQP connection tuning path records the negotiated AMQP frame_max value, but src/main/java/com/rabbitmq/client/impl/SocketFrameHandler.java and NettyFrameHandlerFactory continue to validate broker-controlled frame payload lengths against maxInboundMessageBodySize because the negotiated limit is not applied consistently through setMaxInboundFramePayloadSize. A malicious or compromised broker can send a method frame larger than the negotiated frame_max during or after connection establishment, causing the client to allocate and decode a protocol-invalid frame instead of rejecting it with MalformedFrameException. The protocol violation can disrupt the affected connection and cause client-side denial of service. This issue is fixed in version 5.33.0.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| rabbitmq | rabbitmq-java-client | before 5.33.0 | 5.33.0 | Patch available | CNA |
| — | com.rabbitmq:amqp-client (Maven) | before 5.33.0 | 5.33.0 | Patch available | GHSA-5xwg-cfvj-gff5 |
- rabbitmq-java-client Vendorrabbitmq Affected before 5.33.0 Fixed in 5.33.0 Patch available CNA
- com.rabbitmq:amqp-client (Maven) Vendor— Affected before 5.33.0 Fixed in 5.33.0 Patch available GHSA-5xwg-cfvj-gff5
Remediation
- Fix · CNA rabbitmq-java-client (rabbitmq) Fixed in 5.33.0
- Fix · GHSA-5xwg-cfvj-gff5 com.rabbitmq:amqp-client (Maven) Fixed in 5.33.0 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
Not affected: 2 products
- Red Hat Fuse 7
- Red Hat build of Apache Camel 4 for Quarkus 3
Timeline
- 2026-10-02 Threatist record created from CVE-2026-61634
- 2026-10-03 Alias added: GHSA-5xwg-cfvj-gff5
References
Other 7
- https://github.com/rabbitmq/rabbitmq-java-client/security/advisories/GHSA-5xwg-cfvj-gff5
- https://github.com/rabbitmq/rabbitmq-java-client/pull/1994
- https://github.com/rabbitmq/rabbitmq-java-client/pull/1995
- https://github.com/rabbitmq/rabbitmq-java-client/commit/08790f09686173eb17b48d08a25edcb32e71a591
- https://github.com/rabbitmq/rabbitmq-java-client/commit/b491075f42e89967610c40beded68d3680cfd472
- https://github.com/rabbitmq/rabbitmq-java-client/releases/tag/v5.33.0
- https://github.com/rabbitmq/rabbitmq-java-client
More rabbitmq vulnerabilities
- TI-2026-41154 Improper authentication in rabbitmq-server CVSS 3.1CRITICAL 10.0
- TI-2026-41149 RabbitMQ: UNC SSRF affecting the management UI on Windows CVSS 3.1CRITICAL 10.0
- TI-2026-41158 Resource allocation without limits in rabbitmq-server CVSS 3.1HIGH 7.5
- TI-2026-47695 RabbitMQ: OAuth2 Client Secret Exposed via Unauthenticated JavaScript Endpoint CVSS 4.0HIGH 8.2
- TI-2026-47694 RabbitMQ: JWKS Fetch Ignores HTTP Response Status Code - Signing Key Destruction Causes Authentication DoS CVSS 4.0HIGH 8.2
- TI-2026-45167 RabbitMQ Java client: Unvalidated Class.forName in JSON-RPC ProcedureDescription enables arbitrary class loading CVSS 4.0HIGH 7.5
Sources
- CVE-2026-61634 · CVE Program
- CVE-2026-61634 · NVD
- FIRST EPSS
- GHSA-5xwg-cfvj-gff5 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-61634 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences