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CVE-2026-40970

MEDIUM
6.8
CVSS Score
Published: April 27, 2026 at 07:09 PM UTC
Updated: June 17, 2026 at 10:45 AM UTC
2 products affected across 2 vendorsSpring BootSpring Boot

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Severity
MEDIUM6.8
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Spring Boot· VMware
95%
4.0.0 ≤ v < 4.0.6
Spring Boot· Spring
60%
4.0.0 ≤ v < 4.0.64.0.0
Affected range stops below 4.0.6, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://spring.io/security/cve-2026-40970

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.8MEDIUM[email protected]
Attack Vector
ADJACENT_NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-295

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