CVE-2026-3108
EUVD-2026-1623426.03.2026, 17:16
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 that enable screen manipulation, fake prompts, and clipboard hijacking.. Mattermost Advisory ID: MMSA-2026-00599Enginsight
Affected Products (NVD)
| Vendor | Product | Version |
|---|---|---|
| mattermost | mattermost_server | 10.11.0 ≤ 𝑥 < 10.11.11 |
| mattermost | mattermost_server | 11.2.0 ≤ 𝑥 < 11.2.3 |
| mattermost | mattermost_server | 11.3.0 ≤ 𝑥 < 11.3.2 |
| mattermost | mattermost_server | 11.4.0 |
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
| Vendor | Product | Version | Source |
|---|---|---|---|
| mattermost | mattermost | 11.2.0 ≤ 𝑥 ≤ 11.2.2 | CNA |
| mattermost | mattermost | 10.11.0 ≤ 𝑥 ≤ 10.11.10 | CNA |
| mattermost | mattermost | 𝑥 ≤ 11.4.0 | CNA |
| mattermost | mattermost | 11.3.0 ≤ 𝑥 ≤ 11.3.1 | CNA |
References