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Fencer Vulns
medium 5.0

CVE-2026-40974 json

Spring Boot's Cassandra SSL auto-configuration disables TLS hostname verification

published 2026-04-27 6 mo ago modified 2026-07-24 3 mo ago also GHSA-mqvw-jfmh-93qq , EUVD-2026-25938

cvss
5.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 7%
public exploits
0
none known

Summary

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.

Patch / fix

  • maven org.springframework.boot:spring-boot-cassandra 3.5.14, 4.0.6
  • Spring Spring Boot 2.7.33, 3.3.19, 3.4.16, 3.5.14, 4.0.6

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-40974 updated cvss 6.4

Spring Boot: Cassandra: Spring Boot: Security bypass in Cassandra SSL connections

  • Red Hat AMQ Broker 7 spring-boot Red Hat AMQ Clients spring-boot Red Hat build of Apache Camel - HawtIO 4 spring-boot Red Hat build of Apache Camel for Spring Boot 4 spring-boot Red Hat build of OptaPlanner 8 spring-boot Red Hat Data Grid 8 spring-boot
    +1 more products
    Red Hat Enterprise Linux 8 log4j, log4j-jcl, log4j-web, log4j-slf4j
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux 9 log4j, log4j-jcl, log4j-slf4j
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Fuse 7 spring-boot Red Hat JBoss Enterprise Application Platform 7 spring-boot Red Hat JBoss Enterprise Application Platform 8 spring-boot Red Hat JBoss Enterprise Application Platform Expansion Pack spring-boot Red Hat OpenShift Dev Spaces devspaces/openvsx-rhel9, devspaces/pluginregistry-rhel9 Red Hat Process Automation 7 spring-boot
    +1 more products
    Red Hat Single Sign-On 7 spring-boot
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
6 mo ago

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.0 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub 3.1 5.0 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

Affected packages

ecosystem package affected fixed in
maven org.springframework.boot:spring-boot-cassandra
>=4.0.0, <4.0.6
>=3.5.0, <3.5.14
>=3.4.0, <=3.4.15
>=3.3.0, <=3.3.18
<=2.7.32
4.0.6
3.5.14

Affected products

  • Spring Spring Boot

Classification

Weakness
  • CWE-295 Improper Certificate Validation
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.