CVE-2026-3108 — Terminal Escape Injection in mmctl Report Posts Command

Description (CNA)

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 (CNA)

Vendor / product	Versions
Mattermost / Mattermost	affected 11.2.0 through 11.2.2; affected 10.11.0 through 10.11.10; affected 11.4.0 through 11.4.0; affected 11.3.0 through 11.3.1; unaffected 11.5.0; unaffected 11.2.3; unaffected 10.11.11; unaffected 11.4.1; unaffected 11.3.2

CWE

CWE-150

References

https://mattermost.com/security-updates

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.