CVE-2026-40970: medium-severity vulnerability in Spring Boot
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5epss 0.1%
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:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Affected products
Spring · Spring BootRelated CVEs — Spring Boot
In the same product, most dangerous first.
CVE-2023-34055MEDIUMSpring Boot server Web Observations DoS VulnerabilityEPSS 1.2%CVE-2019-3797LOWAdditional information exposure with Spring Data JPA derived queriesEPSS 1.1%CVE-2026-40976CRITICALCVE-2026-40976EPSS 0.5%CVE-2025-22235HIGHSpring Boot EndpointRequest.to() creates wrong matcher if actuator endpoint is not exposedEPSS 0.4%CVE-2026-22731HIGHAuthentication Bypass under Actuator Health groups pathsEPSS 0.3%CVE-2026-40975MEDIUMCVE-2026-40975EPSS 0.3%