CVE-2026-74869
HIGH
NVD
CVSS Score
7.7
Severity
HIGH
Published
Aug 17, 2026
Vendor
unknown
Description
stoatchat before 0.15.0 contains a missing authorization vulnerability in the Subscribe message handler that allows authenticated attackers to enumerate members and monitor profile updates of private servers without membership. Attackers can subscribe to any server's member-update topic by sending a Subscribe message with an arbitrary server ID, receiving live UserUpdate events including display names, avatars, and status changes for members they should not have access to.