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Critical · 9.1 CVE-2026-40976 EUVD-2026-25940GHSA-8v8j-3hxp-93wr

Spring Boot's default security filter chain has no authorization rule with Actuator but without Health

Published Apr 27, 2026 · Updated Jul 15, 2026 · Assigned by vmware

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.

Affected products

VendorProductAffectedFixed
Spring Spring Boot 4.0.0 – < 4.0.6 4.0.6

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Wolfi

ReleasePackageFixed inAdvisory
Wolfi rolling apache-nifi-registry +1 2.9.0-r7 —

Affected packages

EcosystemPackageAffectedFixedRecord
Maven org.springframework.boot:spring-boot >= 4.0.0, < 4.0.6 4.0.6 GHSA-8v8j-3hxp-93wr

Advisories 6

References