by Kastro
Paper/Archive/CVE-2026-40971

CVE-2026-40971

Spring Spring Boot — When configured to use an SSL bundle, Spring Boot's RabbitMQ auto-configuration does not perform hostname verification when connecting to…

EPSS 0.2%CVSS 9.1
critical.is priorityof 100
28
CVSS 9.1 (NVD)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 4.9.049 × 201.0No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

When configured to use an SSL bundle, Spring Boot's RabbitMQ auto-configuration does not perform hostname verification when connecting to the RabbitMQ broker. Affected: Spring Boot 4.0.0–4.0.5 (fix 4.0.6), 3.5.0–3.5.13 (fix 3.5.14) per vendor advisory.

Affected

ProductAffectedFixed inSource
Spring Boot4.0.0 – < 4.0.64.0.6CNA
Spring Boot3.5.0 – < 3.5.143.5.14CNA

Scores by source

NVD9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
vmware (CNA)5.0CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: partial

References

refspring.io/security/cve-2026-40971