Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Spring Boot's RabbitMQ auto-configuration (package org.springframework.boot:spring-boot-rabbitmq, versions 4.0.0 to 4.0.5 and 3.5.0 to 3.5.13) does not perform hostname verification when connecting to the RabbitMQ broker over SSL bundles. An attacker able to intercept network traffic between the application and the broker could potentially impersonate the broker. Upgrade to 4.0.6 or 3.5.14. The source gives few details on the exact attack conditions.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 5.0 | Medium | 3.1 | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L | CNA (vmware) |
- CISA KEV Not listed.
- EPSS 0.0016, the 4th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:20 UTC First seen by agentprime
- 31 Oct 2026, 14:20 UTC Confirmed by OSV