Spring Boot 4.0.04.0.5/3.5.03.5.13 RabbitMQ SSL Hostname Verification Bypass
CVE-2026-40971 Published on April 27, 2026
When configured to use an SSL bundle, Spring Boot's RabbitMQ auto-configuration does not perform hostname verification when connecting to the RabbitMQ broker. Affected: Spring Boot 4.0.04.0.5 (fix 4.0.6), 3.5.03.5.13 (fix 3.5.14) per vendor advisory.
Vulnerability Analysis
Weakness Type
Improper Certificate Validation
The software does not validate, or incorrectly validates, a certificate. When a certificate is invalid or malicious, it might allow an attacker to spoof a trusted entity by interfering in the communication path between the host and client. The software might connect to a malicious host while believing it is a trusted host, or the software might be deceived into accepting spoofed data that appears to originate from a trusted host.
Products Associated with CVE-2026-40971
Want to know whenever a new CVE is published for VMware Spring Framework? stack.watch will email you.
Affected Versions
Spring Boot:- Version 4.0.0 and below 4.0.6 is affected.
- Version 3.5.0 and below 3.5.14 is affected.