# CVE-2026-3108

## Summary

- **CVE ID:** CVE-2026-3108
- **Severity:** HIGH
- **CVSS Score:** 8 (CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H)
- **CWE:** CWE-150
- **Published:** Mar 26, 2026
- **Last Modified:** Mar 27, 2026

## Description

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-2026-00599

## Affected Products

- Mattermost — Mattermost (11.2.0)
- Mattermost — Mattermost (10.11.0)
- Mattermost — Mattermost (11.4.0)
- Mattermost — Mattermost (11.3.0)
- Mattermost — Mattermost (11.5.0)
- Mattermost — Mattermost (11.2.3)
- Mattermost — Mattermost (10.11.11)
- Mattermost — Mattermost (11.4.1)
- Mattermost — Mattermost (11.3.2)

## References

- [CNA](https://mattermost.com/security-updates)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.28%
- **EPSS Percentile:** 20.2

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._