Spring Security Advisories

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CVE-2026-40971: RabbitMQ auto-configuration with an SSL bundle disables TLS hostname verification

MEDIUM | APRIL 23, 2026 | CVE-2026-40971

Description

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 Products and Versions

Spring Boot:

  • 4.0.0 - 4.0.5
  • 3.5.0 - 3.5.13

Mitigation

Users of affected versions should upgrade to the corresponding fixed version.

Affected version(s) Fix version Availability
4.0.x 4.0.6 OSS
3.5.x 3.5.14 OSS

No further mitigation steps are necessary.

References

History

  • 2026-04-23: Initial vulnerability report published.

Reporting a vulnerability

To report a security vulnerability for a project within the Spring portfolio, see the Security Policy

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