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Description

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.

PUBLISHED Reserved 2026-04-16 | Published 2026-04-27 | Updated 2026-04-29 | Assigner vmware




CRITICAL: 9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Problem types

CWE-862: Missing Authorization

Product status

Default status
unaffected

4.0.0 (custom) before 4.0.6
affected

References

spring.io/security/cve-2026-40976

cve.org (CVE-2026-40976)

nvd.nist.gov (CVE-2026-40976)

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