CVE-2026-40974 Spring Boot's Cassandra SSL auto-configuration disables TLS hostname verification
Spring Boot fails to verify hostnames in Cassandra SSL connections, allowing man-in-the-middle attacks when SSL is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-40974?
CVE-2026-40974 is a medium-severity vulnerability in Spring Boot, published on 27 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-295
Which versions are affected by CVE-2026-40974?
10 open source packages ship an affected version, including org.springframework.boot:spring-boot-cassandra. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.springframework.boot:spring-boot-cassandra Maven | All versions to 2.7.32 | None |
org.springframework.boot:spring-boot-cassandra Maven | All versions to 2.7.32 | None |
org.springframework.boot:spring-boot-cassandra Maven | From 3.3.0 to 3.3.18 | None |
org.springframework.boot:spring-boot-cassandra Maven | From 3.3.0 to 3.3.18 | None |
org.springframework.boot:spring-boot-cassandra Maven | From 3.4.0 to 3.4.15 | None |
org.springframework.boot:spring-boot-cassandra Maven | From 3.4.0 to 3.4.15 | None |
4 more packages
org.springframework.boot:spring-boot-cassandra Maven | From 3.5.0 | 3.5.14 |
org.springframework.boot:spring-boot-cassandra Maven | From 3.5.0 | 3.5.14 |
org.springframework.boot:spring-boot-cassandra Maven | From 4.0.0 | 4.0.6 |
org.springframework.boot:spring-boot-cassandra Maven | From 4.0.0 | 4.0.6 |
Products include Vmware Spring Boot.
How do I fix CVE-2026-40974?
Upgrade org.springframework.boot:spring-boot-cassandra to a fixed version for your release line: 3.5.14 or 4.0.6.
Is CVE-2026-40974 being exploited?
There is no known exploitation of CVE-2026-40974 in the wild and no public exploit code.
Other vulnerabilities in Spring Boot
- CVE-2023-20873 Spring Boot Security Bypass with Wildcard Pattern Matching on Cloud Foundry
- CVE-2026-40976 Spring Boot's default security filter chain has no authorization rule with Actuator but without Health
- CVE-2026-22731 Authentication Bypass under Actuator Health groups paths
- CVE-2026-22733 Authentication Bypass under Actuator CloudFoundry endpoints
- CVE-2022-27772 Temporary Directory Hijacking to Local Privilege Escalation Vulnerability in org.springframework.boot:spring-boot
Sources
Also known as CLSA-2026-1780361412, CLSA-2026-1781484853, CLSA-2026-1783040468, CLSA-2026-1784596267, GHSA-mqvw-jfmh-93qq.