{"action":"Upgrade github.com/mattermost/mattermost/server/v8 to 10.11.14 or later.","affected":[{"fixed":"11.5.2","introduced":"11.5.0"},{"fixed":"11.4.4","introduced":"11.4.0"},{"fixed":"10.11.14","introduced":"10.11.0"}],"component":"github.com/mattermost/mattermost/server/v8","cve_ids":["CVE-2026-6343"],"ecosystem":"Go","epss":0.00165,"exploited":false,"fixed_versions":["11.5.2","11.4.4","10.11.14"],"ghsa_id":"GHSA-m79q-8qf5-v622","id":"tcs_01M5KFFF0ZA63A8VZKXH7ZM1JN","modified_at":"2026-06-25T23:11:41.456154858Z","published_at":"2026-05-18T09:31:48Z","references":["https://osv.dev/vulnerability/GHSA-m79q-8qf5-v622","https://nvd.nist.gov/vuln/detail/CVE-2026-6343","https://github.com/mattermost/mattermost-plugin-playbooks/commit/887d9cacb61655d40f20ad9d6e35b408a127c380","https://github.com/mattermost/mattermost","https://mattermost.com/security-updates"],"severity":{"label":"medium","score":4.3},"sources":[{"source":"osv","source_id":"GHSA-m79q-8qf5-v622","url":"https://osv.dev/vulnerability/GHSA-m79q-8qf5-v622"}],"summary":"Mattermost doesn't check public/private permissions"}