CVE-2026-40971
Spring Boot: Spring Boot: Information disclosure and data tampering via missing hostname verification
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · April 28, 2026
Updated · July 3, 2026
Description
A flaw was found in Spring Boot. When configured to use an SSL (Secure Sockets Layer) bundle, Spring Boot's RabbitMQ auto-configuration does not perform hostname verification when connecting to the RabbitMQ broker. This vulnerability could allow an attacker on the same network to intercept or alter communications. The primary consequences include potential information disclosure and data tampering.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
CVSS / CWE
CVSS 3.1 · 4.2CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CWE-295 · Improper Certificate Validation