CVE-2026-40976

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.

Database specific

{
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "4.0.0"
                },
                {
                    "fixed": "4.0.6"
                }
            ]
        }
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40976.json",
    "cna_assigner": "vmware",
    "cwe_ids": [
        "CWE-862"
    ]
}

References

Affected packages

Git / github.com/spring-projects/spring-boot

Affected ranges

Type

GIT

Repo

https://github.com/spring-projects/spring-boot

Events

Introduced

1c0e08b4c434b0e77a83098267b2a0f5a3fc56d7

Fixed

8821ad2cd381bb4b9615a61479e1de7305a8ba39

Database specific

{
    "source": "CPE_RANGE",
    "cpe": "cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "4.0.0"
        },
        {
            "fixed": "4.0.6"
        }
    ]
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40976.json"