CVE-2026-63336 (GCVE-0-2026-63336)

Vulnerability from cvelistv5 – Published: 2026-08-18 16:29 – Updated: 2026-08-18 17:34
VLAI
Title
RabbitMQ Java client: TrustEverythingTrustManager used by default in useSslProtocol() enables MITM
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, com.rabbitmq.client.ConnectionFactory.useSslProtocol() and ConnectionFactory.useSslProtocol(String) configure com.rabbitmq.client.TrustEverythingTrustManager and leave hostname verification disabled, causing arbitrary server certificates, including self-signed certificates, to be accepted. A network attacker able to intercept a TLS connection can impersonate the RabbitMQ broker, read protected AMQP traffic, and modify traffic without certificate or hostname validation. The fix changes the production TLS helpers to use the JVM default trust store and enables hostname verification, while retaining an explicitly named development-only no-verification helper. This issue is fixed in version 5.33.0.
Severity
5.1 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 17:30 UTC
CWE
  • CWE-295 - Improper Certificate Validation
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7820 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
rabbitmq rabbitmq-java-client Affected: < 5.33.0
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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