Is CVE-2026-3108 actively exploited?

CVE-2026-3108 has no public evidence of in-the-wild exploitation as of 2026-03-30.

What is the CVSS score for CVE-2026-3108?

CVE-2026-3108 has a CVSS score of 8 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H.

How do I patch CVE-2026-3108?

Patch guidance is available from mattermost security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-3108.

Fix CVE-2026-3108 - HIGH mattermost mattermost server

Q: Which products are affected by CVE-2026-3108?

4 products: mattermost mattermost server, mattermost mattermost server, mattermost mattermost server, mattermost mattermost server.

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

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
Attack Vector: network
Complexity: high
Privileges: low
User Action: required
Scope: changed
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-150

Metadata

Primary Vendor: MATTERMOST
Published: 3/26/2026
Last Modified: 3/30/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

mattermost : mattermost_servermattermost : mattermost_servermattermost : mattermost_servermattermost : mattermost_server

Remediation Guidance

Executive Summary

Cite this page

CVE-2026-3108. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2026-3108

View on NIST NVD

CVE-2026-3108 vulnerability