Improper Neutralization

Overview Affected versions of this package are vulnerable to Improper Neutralization via the mmctl component. An attacker can execute arbitrary terminal escape sequences by sending specially crafted messages, potentially leading to manipulation of administrator terminals, including screen...

GHSA-3439-VQGJ-2GCF Mattermost allows attackers to manipulate administrator terminals via crafted messages containing ANSI and OSC escape sequences

Mattermost versions 11.2.x = 11.2.2, 10.11.x = 10.11.10, 11.4.x = 11.4.0, 11.3.x = 11.3.1 fail to sanitize user-controlled post content in the mmctl commands terminal output which allows attackers to manipulate administrator terminals via crafted messages containing ANSI and OSC escape sequences...

CVE-2026-3108

Mattermost versions 11.2.x = 11.2.2, 10.11.x = 10.11.10, 11.4.x = 11.4.0, 11.3.x = 11.3.1 fail to sanitize user-controlled post content in the mmctl commands terminal output which allows attackers to manipulate administrator terminals via crafted messages containing ANSI and OSC escape sequences...

PT-2026-28419

Name of the Vulnerable Software and Affected Versions Mattermost versions 10.11.x through 10.11.10 Mattermost versions 11.2.x through 11.2.2 Mattermost versions 11.3.x through 11.3.1 Mattermost versions 11.4.x through 11.4.0 Description The software does not properly sanitize user-controlled post...