Cloudanix VulnDB

CVE-2026-28732

Medium · 4.3

CVSS

4.3

EPSS

0.3%

Published

May 18, 2026

CISA due date

—

The record

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 Fail to enforce slash command trigger-word uniqueness during command updates which allows an authenticated team member with Manage Own Slash Commands permission to hijack and impersonate existing system or custom slash commands via editing their own slash command trigger to an already-registered trigger through the command update API. Mattermost Advisory ID: MMSA-2026-00597

Affected packages

Ecosystem Package Introduced Fixed

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