{"id":"CVE-2026-13411","summary":"Null condition in Playbooks import crashes the plugin","details":"Mattermost versions 11.7.x \u003c= 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","modified":"2026-11-04T02:48:17.665834962Z","published":"2026-10-22T10:46:05.465Z","database_specific":{"unresolved_ranges":[{"extracted_events":[{"range":[{"introduced":"11.7.0"},{"last_affected":"11.7.11"}],"source":"AFFECTED_FIELD","strategy":"StandardRange"}]}],"cna_assigner":"Mattermost","cwe_ids":["CWE-754"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/13xxx/CVE-2026-13411.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/13xxx/CVE-2026-13411.json"},{"type":"ADVISORY","url":"https://mattermost.com/security-updates"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-13411"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost","events":[{"introduced":"a9e574a82633915f22071f0d7ca2b006f249ec2a"},{"fixed":"cfd96852253e982d4a8f4984e346740fdc1b102a"}],"database_specific":{"extracted_events":[{"range":[{"introduced":"11.7.0"},{"fixed":"11.7.12"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*"}]}}],"versions":["v11.7.12-rc1","v11.7.11-rc1","v11.7.11","v11.7.10","v11.7.9","v11.7.8","v11.7.7","v11.7.6","v11.7.5-rc1","v11.7.5","v11.7.4","v11.7.3","v11.7.2","v11.7.1","v11.7.0","mattermost-redux@11.7.0","@mattermost/types@11.7.0","@mattermost/shared@11.7.0","@mattermost/client@11.7.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-13411.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"}]}