CVE-2026-40971
Spring Boot RabbitMQ SSL Hostname Verification Bypass
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.
INFO
Published Date :
April 27, 2026, 11:16 p.m.
Last Modified :
May 14, 2026, 4:06 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | dcf2e128-44bd-42ed-91e8-88f912c1401d | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Update Spring Boot to at least version 4.0.6.
- Update Spring Boot to at least version 3.5.14.
- Ensure SSL bundle is configured correctly for RabbitMQ.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-40971.
| URL | Resource |
|---|---|
| https://spring.io/security/cve-2026-40971 | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-40971 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-40971
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-40971 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-40971 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 14, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Added CPE Configuration OR *cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:* versions from (including) 4.0.0 up to (excluding) 4.0.6 *cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:* versions from (including) 3.5.0 up to (excluding) 3.5.14 Added Reference Type VMware: https://spring.io/security/cve-2026-40971 Types: Vendor Advisory -
New CVE Received by [email protected]
Apr. 27, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L Added CWE CWE-295 Added Reference https://spring.io/security/cve-2026-40971