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CVE-2026-40976 - Vulnerability Analysis

CriticalCVSS: 9.1

Last Updated: April 28, 2026

Spring Boot - Broken Access Control

Published: April 28, 2026Updated: April 28, 2026Remote Exploitable

Overview

Spring Boot 4.0.0–4.0.5 contains a broken access control vulnerability caused by ineffective default web security configuration, letting unauthorized attackers access all endpoints, exploit requires no custom Spring Security configuration and specific dependencies.

Severity & Score

Severity: Critical

CVSS Score: 9.1

Impact

Unauthorized attackers can access all endpoints, potentially exposing sensitive data or functionality.

Mitigation

Upgrade to version 4.0.6 or later.

References

https://spring.io/security/cve-2026-40976

Related Resources

Vulnerability Intelligence Dashboard
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Details

CVE ID: CVE-2026-40976
Severity: Critical
CVSS Score: 9.1
Type: broken_access_control
Status: new

CWE

CWE-862

CVSS Metrics

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