CVE-2026-40971

[CVE catalog]

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. Spring Boot: Spring Boot: Information disclosure and data tampering via missing hostname verification 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.

Severity

Medium · CVSS 5

Published

Apr 23, 2026, 10:00:00 PM UTC

Source

[NVD] · [CVE record]

EPSS

0.16% · Oct 27, 2026

{
  "package_releases": [],
  "fixed_versions": [],
  "distribution_packages": [
    {
      "name": "spring_boot",
      "ecosystem": "cpe",
      "fixed_version": "3.5.14"
    },
    {
      "name": "spring_boot",
      "ecosystem": "cpe",
      "fixed_version": "4.0.6"
    }
  ]
}