Vulnerability Details CVE-2026-13411
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
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 25.1%
CVSS Severity
CVSS v3 Score 4.3
References
Products affected by CVE-2026-13411
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cpe:2.3:a:mattermost:mattermost_server:11.7.0
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cpe:2.3:a:mattermost:mattermost_server:11.7.1
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cpe:2.3:a:mattermost:mattermost_server:11.7.10
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cpe:2.3:a:mattermost:mattermost_server:11.7.11
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cpe:2.3:a:mattermost:mattermost_server:11.7.2
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cpe:2.3:a:mattermost:mattermost_server:11.7.3
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cpe:2.3:a:mattermost:mattermost_server:11.7.4
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cpe:2.3:a:mattermost:mattermost_server:11.7.5
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cpe:2.3:a:mattermost:mattermost_server:11.7.6
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cpe:2.3:a:mattermost:mattermost_server:11.7.7
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cpe:2.3:a:mattermost:mattermost_server:11.7.8
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cpe:2.3:a:mattermost:mattermost_server:11.7.9