SUSE CVE-2026-6046

Mattermost versions 11.6.x = 11.6.1, 11.5.x = 11.5.4, 10.11.x = 10.11.15, 10.11.x = 10.11.16 fail to validate that a username returned during bot registration belongs to a bot account, which allows an unprivileged attacker to intercept private messages sent by plugins via direct message channels ...

Information Exposure

Overview Affected versions of this package are vulnerable to Information Exposure via the bot registration process. An attacker can intercept private messages sent by plugins by pre-registering a user account with a predictable bot username. Remediation Upgrade...

CVE-2026-6046: Exposure of Sensitive Information to an Unauthorized Actor

Mattermost versions 11.6.x = 11.6.1, 11.5.x = 11.5.4, 10.11.x = 10.11.15, 10.11.x = 10.11.16 fail to validate that a username returned during bot registration belongs to a bot account, which allows an unprivileged attacker to intercept private messages sent by plugins via direct message channels ...