Improper Validation of Certificate with Host Mismatch Affecting org.springframework.boot:spring-boot-autoconfigure package, versions [3.2.0,3.5.14)[4.0.0-M1,4.0.6)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published24 Apr 2026
- disclosed23 Apr 2026
- creditUnknown
Introduced: 23 Apr 2026
CVE-2026-40971 (opens in a new tab)How to fix?
Upgrade org.springframework.boot:spring-boot-autoconfigure to version 3.5.14, 4.0.6 or higher.
Overview
Affected versions of this package are vulnerable to Improper Validation of Certificate with Host Mismatch when using an SSL bundle. This effectively weakens TLS by allowing connections without verifying the server identity (classic MITM risk).