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Vulnerability details: VCID-w8ap-9xym-xfg4
Vulnerability ID VCID-w8ap-9xym-xfg4
Aliases CVE-2026-40976
GHSA-8v8j-3hxp-93wr
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.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-862 Missing Authorization
CWE-305 Authentication Bypass by Primary Weakness
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3 9.1 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-40976.json
epss 0.00023 https://api.first.org/data/v1/epss?cve=CVE-2026-40976
epss 0.00023 https://api.first.org/data/v1/epss?cve=CVE-2026-40976
epss 0.00023 https://api.first.org/data/v1/epss?cve=CVE-2026-40976
epss 0.00023 https://api.first.org/data/v1/epss?cve=CVE-2026-40976
cvssv3.1_qr CRITICAL https://github.com/advisories/GHSA-8v8j-3hxp-93wr
cvssv3.1 9.1 https://github.com/spring-projects/spring-boot
generic_textual CRITICAL https://github.com/spring-projects/spring-boot
cvssv3.1 9.1 https://nvd.nist.gov/vuln/detail/CVE-2026-40976
generic_textual CRITICAL https://nvd.nist.gov/vuln/detail/CVE-2026-40976
cvssv3.1 9.1 https://spring.io/security/cve-2026-40976
generic_textual CRITICAL https://spring.io/security/cve-2026-40976
ssvc Track https://spring.io/security/cve-2026-40976
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-40976.json
https://api.first.org/data/v1/epss?cve=CVE-2026-40976
https://github.com/spring-projects/spring-boot
https://nvd.nist.gov/vuln/detail/CVE-2026-40976
2463322 https://bugzilla.redhat.com/show_bug.cgi?id=2463322
cve-2026-40976 https://spring.io/security/cve-2026-40976
GHSA-8v8j-3hxp-93wr https://github.com/advisories/GHSA-8v8j-3hxp-93wr
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-40976.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Found at https://github.com/spring-projects/spring-boot
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2026-40976
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Found at https://spring.io/security/cve-2026-40976
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:T/P:M/B:A/M:M/D:T/2026-04-28T13:54:43Z/ Found at https://spring.io/security/cve-2026-40976
Exploit Prediction Scoring System (EPSS)
Percentile 0.0669
EPSS Score 0.00023
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T16:53:16.516328+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2026/40xxx/CVE-2026-40976.json 38.6.0