CVE-2026-40976

CriticalCVSS 9.1/10Last modified Jul 24, 2026

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.

Metrics

CVSS 3.1 9.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-862 CWE-305

Affected software

No affected versions have been published.

Timeline

Published: Apr 28, 2026
Last modified: Jul 24, 2026
NVD status: Modified

Related CVEs from 2026

CVE-2026-409776.7When an application is configured to use `ApplicationPidFileWriter`, a local attacker with write access to the PID file's location can corru CVE-2026-409788.8SQL injection vulnerability in Spring AI's `CosmosDBVectorStore` allows attackers to execute arbitrary SQL queries via crafted document IDs.CVE-2026-409796.1In Spring AI, having access to a shared environment can expose the ONNX model used by the application. Affected versions: Spring AI: 1.0.0 CVE-2026-409806.5In Spring AI, a malicious PDF file can be crafted that triggers the allocation of unreasonable amounts of memory when handled by `ForkPDFLay CVE-2026-409817.5When using Google Secrets Manager as a backend for the Spring Cloud Config server a client can craft a request to the config server potentia CVE-2026-409829.1Spring Cloud Config allows applications to serve arbitrary text and binary files through the spring-cloud-config-server module. A malicious CVE-2026-409837.5In Micrometer, it is possible for a user to provide specially crafted gRPC requests that may cause a denial-of-service (DoS) condition. Aff CVE-2026-409847.5In Micrometer, it is possible for a user to provide specially crafted HTTP requests that may cause a denial-of-service (DoS) condition. Aff CVE-2026-409856.4Applications that configure the WebFlowELExpressionParser are vulnerable to the use of malicious Unified EL expressions. Affected versions:CVE-2026-409864.8Spring Web Flow's JavaScript RemotingHandler renders the body of an error response as HTML even when the response is not "text/html", which CVE-2026-409877.1A malicious or compromised FTP/SFTP/SMB server can write arbitrary files anywhere on the client filesystem (outside the configured local-dir CVE-2026-409887.5An application using spring-security-saml2-service-provider and the REDIRECT binding for SAML 2.0 Login or Logout may be vulnerable to a den