How severe is CVE-2026-40970?

CVE-2026-40970 has a CVSS 3.x base score of 5.0, rated medium severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-40970 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40970?

CVE-2026-40970 affects Vmware Spring Boot. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-40970?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-40970 have an EU (EUVD) identifier?

Yes. CVE-2026-40970 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25908.

When was CVE-2026-40970 published?

CVE-2026-40970 was published on 2026-04-27 and last updated on 2026-06-17.

CVE-2026-40970

CVE-2026-40970 is a medium-severity vulnerability in Vmware Spring Boot with a CVSS 3.x base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-295.

Key facts

Severity: Medium (CVSS 3.x base score 5.0)
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-25908
Weakness: CWE-295
Affected product: Vmware Spring Boot
Published: 2026-04-27
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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 4.0.0–4.0.5; upgrade to 4.0.6 or later per vendor advisory.
How severe is CVE-2026-40970?: CVE-2026-40970 has a CVSS 3.x base score of 5.0, rated medium severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-40970 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40970?: CVE-2026-40970 affects Vmware Spring Boot. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-40970?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-40970 have an EU (EUVD) identifier?: Yes. CVE-2026-40970 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-25908.
When was CVE-2026-40970 published?: CVE-2026-40970 was published on 2026-04-27 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:*

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