CVE-2026-40970 PUBLISHED

Assigner: vmware
Reserved: 16.04.2026 Published: 27.04.2026 Updated: 27.04.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
CVSS Score: 5

Attack Vector	Adjacent Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	Low
Privileges Required	None	Integrity Impact	Low
User Interaction	None	Availability Impact	Low

CVSS 3.1

Product Status

Vendor	Spring
Product	Spring Boot
Versions	Default: unaffected affected from 4.0.0 to 4.0.6 (excl.)

References

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

Problem Types

CWE-295: Improper Certificate Validation CWE