SecuriTricks - CVE-2026-3108

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

Product(s) Impacted

Vendor	Product	Versions
Mattermost	Mattermost	11.2.0-11.2.2, 10.11.0-10.11.10, 11.4.0, 11.3.0-11.3.1

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-150

Improper Neutralization of Escape, Meta, or Control Sequences

The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could be interpreted as escape, meta, or control character sequences when they are sent to a downstream component.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	mattermost	mattermost	11.2.0-11.2.2	/	/	/	/	/	/	/
a	mattermost	mattermost	10.11.0-10.11.10	/	/	/	/	/	/	/
a	mattermost	mattermost	11.4.0	/	/	/	/	/	/	/
a	mattermost	mattermost	11.3.0-11.3.1	/	/	/	/	/	/	/

References

https://mattermost.com/security-updates

CVSS Score

8.0 / 10

CVSS Data - 3.1

Attack Vector: NETWORK
Attack Complexity: HIGH
Privileges Required: LOW
Scope: CHANGED
Confidentiality Impact: HIGH
Integrity Impact: HIGH
Availability Impact: HIGH

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H

View Vector String

Timeline

Published: March 26, 2026, 5:16 p.m.
Last Modified: March 26, 2026, 5:16 p.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

[email protected]

CVE-2026-3108