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MEDIUM · 5.0

CVE-2026-40970

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....

Vulnerability 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.

CVSS Score

5.0

MEDIUM

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack Vector
ADJACENT_NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
LOW

Affected Products

VendorProductVersions
VmwareSpring Boot>= 4.0.0, < 4.0.6

Related Weaknesses (CWE)

CWE-295

References

FAQ

What is CVE-2026-40970?

CVE-2026-40970 is a vulnerability with a CVSS score of 5.0 (MEDIUM). 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....

How severe is CVE-2026-40970?

CVE-2026-40970 has been rated MEDIUM with a CVSS base score of 5.0/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-40970?

Check the references section above for vendor advisories and patch information. Affected products include: Vmware Spring Boot.