Improper validation of certificate with host mismatch in Spring Boot - CVE-2026-40971
Published: April 27, 2026
Vulnerability identifier: #VU128230
CSH Severity: Medium
CVSS v4: 2.3 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-40971
CWE-ID: CWE-297
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information, modify data, or cause a denial of service.
The vulnerability exists due to improper certificate validation in RabbitMQ auto-configuration when connecting to the RabbitMQ broker using an SSL bundle. A remote attacker can present a crafted certificate to disclose sensitive information, modify data, or cause a denial of service.
Affected software
Spring Boot
IBM Sterling Connect:Direct Web Services
IBM InfoSphere Information Server
IBM Sterling Connect:Direct Web Services
IBM InfoSphere Information Server
How to mitigate CVE-2026-40971
Install security update from vendor's website.
Spring Boot - addressed in versions 3.5.14, 4.0.6
IBM Sterling Connect:Direct Web Services - addressed in versions 6.3.0.19, 6.4.0.8
IBM InfoSphere Information Server - update to 11.7.1.6 Service pack 3
IBM Sterling Connect:Direct Web Services - addressed in versions 6.3.0.19, 6.4.0.8
IBM InfoSphere Information Server - update to 11.7.1.6 Service pack 3