CVE-2026-40976

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

Spring Boot

Vmware Spring Boot

< 4.0.6

Fix

Available

CVSS 3.1

9.1 CRITICAL

EPSS

0.5% (39th percentile)

Weakness

CWE-862, CWE-305

NVD status

Modified

Published

2026-04-27

No exploit for CVE-2026-40976 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.