{"action":"Upgrade github.com/mattermost/mattermost/server/v8 to 10.11.14 or later.","affected":[{"fixed":"11.5.2","introduced":"11.5.0"},{"fixed":"10.11.14","introduced":"10.11.0"}],"component":"github.com/mattermost/mattermost/server/v8","cve_ids":["CVE-2026-4286"],"ecosystem":"Go","epss":0.00143,"exploited":false,"fixed_versions":["11.5.2","10.11.14"],"ghsa_id":"GHSA-gvg4-jhmr-6j23","id":"tcs_01M5KFBET3YMV2FT3D0XQCY80H","modified_at":"2026-06-25T23:11:03.539482431Z","published_at":"2026-05-18T09:31:48Z","references":["https://osv.dev/vulnerability/GHSA-gvg4-jhmr-6j23","https://nvd.nist.gov/vuln/detail/CVE-2026-4286","https://github.com/mattermost/mattermost-plugin-playbooks/commit/e1d6ec2c94e695fb74e0c0c11c0d45e028bb96f3","https://github.com/mattermost/mattermost","https://mattermost.com/security-updates"],"severity":{"label":"low","score":3.1},"sources":[{"source":"osv","source_id":"GHSA-gvg4-jhmr-6j23","url":"https://osv.dev/vulnerability/GHSA-gvg4-jhmr-6j23"}],"summary":"Mattermost doesn't check if {{team_id}} was being changed when updating playbooks"}