CVE-2026-40974: Critical severity maven/org.springframework.boot/spring-boot-autoconfigure vulnerability

Q: What is the severity of CVE-2026-40974?

The severity of CVE-2026-40974 is considered high due to the potential for man-in-the-middle attacks when SSL connections to Cassandra are improperly validated.

Q: How do I fix CVE-2026-40974?

To fix CVE-2026-40974, upgrade Spring Boot to version 4.0.6, 3.5.14, 3.4.16, 3.3.19, or 2.7.33.

Q: Which versions of Spring Boot are affected by CVE-2026-40974?

Affected versions include Spring Boot 4.0.0 to 4.0.5, 3.5.0 to 3.5.13, 3.4.0 to 3.4.15, 3.3.0 to 3.3.18, and 2.7.0 to 2.7.32.

Q: What is the impact of CVE-2026-40974 on applications?

The impact of CVE-2026-40974 allows attackers to intercept and manipulate data between a Spring Boot application and a Cassandra database due to hostname verification not being enforced.

Q: Is there a workaround for CVE-2026-40974 before upgrading?

There is no official workaround mentioned for CVE-2026-40974; upgrading to a fixed version is strongly recommended to mitigate the risk.

Published Apr 27, 2026

Updated

Spring Boot's Cassandra auto-configuration does not perform hostname verification when establishing an SSL connection to Cassandra.

Affected: Spring Boot 4.0.0–4.0.5 (fix 4.0.6), 3.5.0–3.5.13 (fix 3.5.14), 3.4.0–3.4.15 (fix 3.4.16), 3.3.0–3.3.18 (fix 3.3.19), 2.7.0–2.7.32 (fix 2.7.33); Cassandra SSL auto-configuration. Versions that are no longer supported are also affected per vendor advisory.

Affected Software

6 affected components

maven/org.springframework.boot/spring-boot-autoconfigure>=4.0.0<=4.0.5, >=3.5.0<=3.5.13, >=3.4.0<=3.4.15, >=3.3.0<=3.3.18, >=2.7.0<=2.7.32

VMware Spring Boot>=2.7.0<2.7.33

VMware Spring Boot>=3.3.0<3.3.19

VMware Spring Boot>=3.4.0<3.4.16

VMware Spring Boot>=3.5.0<3.5.14

VMware Spring Boot>=4.0.0<4.0.6

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade Spring Boot to a version that resolves this vulnerability.
Fixed in 4.0.6
Upgrade
Upgrade Spring Boot to a version that resolves this vulnerability.
Fixed in 3.5.14
Upgrade
Upgrade Spring Boot to a version that resolves this vulnerability.
Fixed in 3.4.16
Upgrade
Upgrade Spring Boot to a version that resolves this vulnerability.
Fixed in 3.3.19
Upgrade
Upgrade Spring Boot to a version that resolves this vulnerability.
Fixed in 2.7.33

Event History

Apr 27, 2026

CVE Published

via MITRE·11:31 PM

Data Sourced

via MITRE·11:31 PM

DescriptionSeverityWeakness

Apr 28, 2026

Data Sourced

via NVD·12:16 AM

DescriptionSeverityWeaknessAffected Software

Feb 21, 58337

Event

via NVD·01:49 PM

Frequently Asked Questions

What is the severity of CVE-2026-40974?

The severity of CVE-2026-40974 is considered high due to the potential for man-in-the-middle attacks when SSL connections to Cassandra are improperly validated.

How do I fix CVE-2026-40974?

To fix CVE-2026-40974, upgrade Spring Boot to version 4.0.6, 3.5.14, 3.4.16, 3.3.19, or 2.7.33.

Which versions of Spring Boot are affected by CVE-2026-40974?

Affected versions include Spring Boot 4.0.0 to 4.0.5, 3.5.0 to 3.5.13, 3.4.0 to 3.4.15, 3.3.0 to 3.3.18, and 2.7.0 to 2.7.32.

What is the impact of CVE-2026-40974 on applications?