Executive brief
IBM Concert is a software platform used by enterprises for collaborative workflow and communication. A flaw in certificate validation allows remote attackers to intercept and tamper with communications through man-in-the-middle attacks, potentially enabling unauthorized access to sensitive data or system functions.
Technical details
The vulnerability stems from improper certificate validation in IBM Concert versions 1.0.0 through 2.3.1. An attacker positioned on the network path between a client and server can exploit this flaw to intercept TLS/SSL connections without detection. The vulnerability likely fails to properly verify certificate chain, hostname matching, or certificate validity dates, allowing an attacker to present a fraudulent certificate and decrypt/modify traffic. No authentication is required; the attack succeeds at the network layer before any application-level authentication occurs. A patch is available in version 3.0.0 or later.
Affected products
- IBM Concert 1.0.0 through 2.3.1
Timeline
- 2026-08-28: disclosed