Improper Certificate Validation in RabbitMQ Server - #VU137250
Published: July 9, 2026
Vulnerability identifier: #VU137250
CSH Severity: High
CVSS v4 BT: 8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: N/A
CWE-ID: CWE-295
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass TLS client authentication.
The vulnerability exists due to improper certificate validation in the rabbitmq_trust_store verify_fun when handling a presented client certificate during the TLS handshake. A remote attacker can present a forged self-signed certificate with a matching issuer distinguished name and serial number to bypass TLS client authentication.
Exploitation requires the trust-store plugin to be enabled and used as the TLS verify function, and requires knowledge of the issuer and serial number of a whitelisted certificate.
Affected software
RabbitMQ Server
Remediation
Install security update from vendor's website.
RabbitMQ Server - addressed in versions 3.13.15, 4.0.20, 4.1.11, 4.2.6