Review reviewCritical

CVE-2026-40976

Spring Spring Boot, Red Hat AMQ Broker 7, Red Hat AMQ Clients

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.

CVSS: 9.1
EPSS: 0.49%
CISA KEV: Not listed
Published: 2026.04.28

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.49%

Technical severityCVSS 9.1

Vulnerability overview

Affected product and versions

Product: Spring Spring Boot, Red Hat AMQ Broker 7, Red Hat AMQ Clients
Affected versions: >= 4.0.0 < 4.0.6
Fixed versions: 4.0.6

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Spring Spring Boot, Red Hat AMQ Broker 7, Red Hat AMQ Clients and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE: CWE-305, CWE-862