Critical [CVE-2026-40976] In certain circumstances, Spring Boot's default web security is ineffective allowing unauthorized access to all endpoints
This critical-severity VMware (Broadcom) advisory covers CVE-2026-40976 affecting Spring Boot, Spring Security.
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Summary
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.
- 4.0.0
- 4.0.5
NVD record · high-confidence parse· fetched 2 months ago·verify at source
Mitigation
Upgrade to a fixed release: 4.0.6. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
NVD record · high-confidence parse· fetched 2 months ago·verify at source
Discussion(0)
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