{"cve":"CVE-2026-40976","nvd":{"published":"2026-04-28T00:16:24.803","modified":"2026-07-24T21:10:00.143","status":"Modified","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.\n\nAffected: Spring Boot 4.0.0–4.0.5; upgrade to 4.0.6 or later per vendor advisory.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":9.1},"cwes":["CWE-862","CWE-305"],"references":["https://spring.io/security/cve-2026-40976","https://access.redhat.com/security/cve/CVE-2026-40976","https://bugzilla.redhat.com/show_bug.cgi?id=2463322","https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40976.json"],"products":["vmware:spring_boot"],"source":"nvd","synced_at":"2026-10-19T22:33:09.003606135+00:00"},"epss":{"cve":"CVE-2026-40976","score":0.00489,"percentile":0.42092,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-8v8j-3hxp-93wr","url":"https://osv.dev/vulnerability/GHSA-8v8j-3hxp-93wr","summary":"Spring Boot's default security filter chain has no authorization rule with Actuator but without Health","modified":"2026-09-10T03:51:01.304654672Z","packages":[{"ecosystem":"Maven","name":"org.springframework.boot:spring-boot","purl":"pkg:maven/org.springframework.boot/spring-boot","ranges":[">=4.0.0 <4.0.6"],"fixed":["4.0.6"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}