Mattermost versions 11.7.x <= 11.7.11 fail to validate null elements when decoding playbook import conditions which allows an authenticated attacker to crash the Playbooks plugin instance-wide via a crafted import request containing a null condition. Mattermost Advisory ID: MMSA-2026-00709
References
History

Thu, 22 Oct 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 22 Oct 2026 13:30:00 +0000

Type Values Removed Values Added
First Time appeared Mattermost
Mattermost mattermost
Vendors & Products Mattermost
Mattermost mattermost

Thu, 22 Oct 2026 11:00:00 +0000

Type Values Removed Values Added
Description Mattermost versions 11.7.x <= 11.7.11 fail to validate null elements when decoding playbook import conditions which allows an authenticated attacker to crash the Playbooks plugin instance-wide via a crafted import request containing a null condition. Mattermost Advisory ID: MMSA-2026-00709
Title Null condition in Playbooks import crashes the plugin
Weaknesses CWE-754
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Mattermost

Published: 2026-10-22T10:46:05.465Z

Updated: 2026-10-22T13:37:46.805Z

Reserved: 2026-06-26T10:25:44.166Z

Link: CVE-2026-13411

cve-icon Vulnrichment

Updated: 2026-10-22T13:32:35.508Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-22T11:17:52.843

Modified: 2026-10-22T17:36:46.950

Link: CVE-2026-13411

cve-icon Redhat

No data.