CVE-2026-40970

MEDIUM

Spring Boot 4.0.0-4.0.5 - Auth Bypass

Title source: llm

Description

When configured to use an SSL bundle, Spring Boot's Elasticsearch auto-configuration does not perform hostname verification when connecting to the Elasticsearch server. Affected: Spring Boot 4.0.0–4.0.5; upgrade to 4.0.6 or later per vendor advisory.

References (1)

Core 1

Core References

https://spring.io/security/cve-2026-40970

Scores

CVSS v3 5.0

EPSS 0.0014

EPSS Percentile 3.3%

Attack Vector ADJACENT_NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-295

Status published

Products (3)

org.springframework.boot/spring-boot-elasticsearch 4.0.0 - 4.0.6Maven

Spring/Spring Boot 4.0.0 - 4.0.6

vmware/spring_boot 4.0.0 - 4.0.6

Published Apr 27, 2026

Tracked Since Apr 28, 2026