CVE-2026-40976: VMware Spring Boot

Critical severity, CVSS 9.1. EPSS: 0.5% chance of exploitation in the next 30 days.

In certain circumstances, Spring Boot's default web security is ineffective allowing unauthorized access to all endpoints. For an application to be vulnerable, it must: be a servlet-based web application; have no Spring Security configuration of its own and rely on the default web security filter chain; depend on spring-boot-actuator-autoconfigure; not depend on spring-boot-health. If any of the above does not apply, the application is not vulnerable. Affected: Spring Boot 4.0.0–4.0.5; upgrade to 4.0.6 or later per vendor advisory.

Affected products

• VMware Spring Boot: from 4.0.0, before 4.0.6 (fixed in 4.0.6)

Published 2026-04-28. Last modified 2026-07-24.