CVE-2026-3117

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CVSS 3.1

6.5 medium

EPSS

<1%p14

Published

May 18, 2026 (May 18, 2026)

Modified

Jun 17, 2026

Description

Mattermost Plugins versions <=11.5 11.1.5 10.13.11 11.3.4.0 fail to properly check for permissions when processing commands in the Gitlab plugin which allows normal users to uninstall instances or setup webhook connections via the {{gitlab instance {option}}} or the {{/gitlab webhook {option}}} commands. Mattermost Advisory ID: MMSA-2026-00600

Vendors: mattermost
Products: mattermost server
Weakness: CWE-862
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (0.2%)

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