Vulnerability-Lookup

FKIE_CVE-2026-40976

Vulnerability from fkie_nvd - Published: 2026-04-28 00:16 - Updated: 2026-07-24 21:10

Severity

9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

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.

References

URL	Tags
security@vmware.com	https://spring.io/security/cve-2026-40976	Vendor Advisory
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/security/cve/CVE-2026-40976
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://bugzilla.redhat.com/show_bug.cgi?id=2463322
0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40976.json

Impacted products

	Vendor	Product	Version
	vmware	spring_boot	*

JSON

To clipboard

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      "affectedData": [
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          "cpes": [
            "cpe:/a:redhat:openshift_devspaces:3"
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          "packageName": "devspaces/openvsx-rhel9",
          "product": "Red Hat OpenShift Dev Spaces",
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    }
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              "versionEndExcluding": "4.0.6",
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      "value": "In certain circumstances, Spring Boot\u0027s 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.\n\nAffected: Spring Boot 4.0.0\u20134.0.5; upgrade to 4.0.6 or later per vendor advisory."
    },
    {
      "lang": "es",
      "value": "En ciertas circunstancias, la seguridad web predeterminada de Spring Boot es ineficaz, permitiendo el acceso no autorizado a todos los puntos finales. Para que una aplicaci\u00f3n sea vulnerable, debe: ser una aplicaci\u00f3n web basada en servlets; no tener configuraci\u00f3n propia de Spring Security y depender de la cadena de filtros de seguridad web predeterminada; depender de spring-boot-actuator-autoconfigure; no depender de spring-boot-health. Si alguna de las condiciones anteriores no se cumple, la aplicaci\u00f3n no es vulnerable.\n\nAfectado: Spring Boot 4.0.0-4.0.5; actualizar a 4.0.6 o posterior seg\u00fan el aviso del proveedor."
    }
  ],
  "id": "CVE-2026-40976",
  "lastModified": "2026-07-24T21:10:00.143",
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
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}

CVE-2026-40976 (GCVE-0-2026-40976)

Vulnerability from cvelistv5 – Published: 2026-04-27 23:34 – Updated: 2026-07-15 01:00

Summary

Severity

9.1 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-28 00:00 UTC

CWE

CWE-862 - Missing Authorization
CWE-305 - Authentication Bypass by Primary Weakness

Assigner

vmware mitre root

References

4 references

URL	Tags
https://spring.io/security/cve-2026-40976
https://access.redhat.com/security/cve/CVE-2026-40976	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2463322	issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex

Impacted products

16 products

Vendor	Product	Version
Spring	Spring Boot	Affected: 4.0.0 , < 4.0.6 (custom)
Red Hat	Red Hat AMQ Broker 7	cpe:/a:redhat:amq_broker:7
Red Hat	Red Hat AMQ Clients	cpe:/a:redhat:amq_clients:2023
Red Hat	Red Hat build of Apache Camel for Spring Boot 4	cpe:/a:redhat:camel_spring_boot:4
Red Hat	Red Hat build of Apache Camel - HawtIO 4	cpe:/a:redhat:apache_camel_hawtio:4
Red Hat	Red Hat build of OptaPlanner 8	cpe:/a:redhat:optaplanner:::el6
Red Hat	Red Hat Data Grid 8	cpe:/a:redhat:jboss_data_grid:8
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat Fuse 7	cpe:/a:redhat:jboss_fuse:7
Red Hat	Red Hat JBoss Enterprise Application Platform 7	cpe:/a:redhat:jboss_enterprise_application_platform:7
Red Hat	Red Hat JBoss Enterprise Application Platform 8	cpe:/a:redhat:jboss_enterprise_application_platform:8
Red Hat	Red Hat JBoss Enterprise Application Platform Expansion Pack	cpe:/a:redhat:jbosseapxp
Red Hat	Red Hat OpenShift Dev Spaces	cpe:/a:redhat:openshift_devspaces:3
Red Hat	Red Hat Process Automation 7	cpe:/a:redhat:jboss_enterprise_bpms_platform:7
Red Hat	Red Hat Single Sign-On 7	cpe:/a:redhat:red_hat_single_sign_on:7

Show details on NVD website

JSON

To clipboard

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                "timestamp": "2026-04-28T00:00:00+00:00",
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            "cpes": [
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            "defaultStatus": "unaffected",
            "packageName": "log4j:2/log4j",
            "product": "Red Hat Enterprise Linux 8",
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            "cpes": [
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.