Improper Validation of Certificate with Host Mismatch Affecting org.springframework.boot:spring-boot-autoconfigure package, versions [,3.5.14)[4.0.0-M1,4.0.6)
Threat Intelligence
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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-2026-40974 (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 due to establishing SSL connections to Cassandra without verifying that the hostname in the server's SSL certificate actually matched the hostname of the server being connected to. While the application might have verified that the certificate was signed by a trusted Certificate Authority (CA), failing to verify the hostname means an attacker could present any valid certificate (even one meant for a different domain) to successfully intercept the connection, leaving the application vulnerable to Man-in-the-Middle (MitM) attacks.