CVE-2026-26447: Use After Free
Stomper 5e2741e is vulnerable to Use-After-Free. When a single client repeatedly issues SUBSCRIBE commands for the same destination over one connection and then closes that connection, the broker performs incorrect cleanup of its internal subscription structures. This results in a heap use-after-free during StompClient destruction, causing the broker process to crash. An unauthenticated client can exploit this to reliably trigger a denial of service.
Affected Software
Event History
Frequently Asked Questions
Does exploitation require authentication or prior access to the broker?
No. An unauthenticated client can exploit the issue by connecting to the broker.
What is the practical impact of a successful exploit?
The broker process crashes during StompClient destruction, resulting in a denial of service.
What client behavior triggers the vulnerable cleanup path?
A single client repeatedly sends SUBSCRIBE commands for the same destination over one connection and then closes that connection.