CVE-2026-40971

Name: CVE-2026-40971
Creator: NVD / NIST
Published: 2026-04-27T23:16:03.403+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 0.16%

Last modified Jun 17, 2026

CVE-2026-40971 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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.. EPSS estimates a 0.16% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

9.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS Probability

0.16%

5.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-295

Affected Software

Vendor	Product	Versions
Vmware	Spring Boot	>= 3.5.0, < 3.5.14
Vmware	Spring Boot	>= 4.0.0, < 4.0.6

References

https://spring.io/security/cve-2026-40971Vendor Advisory

Timeline

Published: Apr 27, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-40971?

How severe is CVE-2026-40971?

CVE-2026-40971 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 0.16% probability of exploitation in the next 30 days.

How do I fix CVE-2026-40971?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-40971?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST