CVE-2026-13411

Published Oct 22, 2026

Last updated 3 days ago

CVSS medium 4.3

Overview

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
Source
responsibledisclosure@mattermost.com
NVD status
Awaiting Analysis

Risk scores

CVSS 3.1

Type
Secondary
Base score
4.3
Impact score
1.4
Exploitability score
2.8
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Severity
MEDIUM

Weaknesses

responsibledisclosure@mattermost.com
CWE-754

Social media

Hype score
Not currently trending

References

Sources include official advisories and independent security research.