{"action":"Upgrade github.com/mattermost/mattermost-server to 10.11.17 or later.","affected":[{"fixed":"11.6.1","introduced":"11.6.0"},{"fixed":"11.5.5","introduced":"11.5.0"},{"fixed":"10.11.17","introduced":"10.11.0"}],"component":"github.com/mattermost/mattermost-server","cve_ids":["CVE-2026-6739"],"ecosystem":"Go","epss":0.00257,"exploited":false,"fixed_versions":["11.6.1","11.5.5","10.11.17"],"ghsa_id":"GHSA-m2w9-h2mm-79qr","id":"tcs_01M5KFF1BN0939W18PHWKMCR6E","modified_at":"2026-09-10T03:51:08.919891159Z","published_at":"2026-06-12T18:31:59Z","references":["https://osv.dev/vulnerability/GHSA-m2w9-h2mm-79qr","https://nvd.nist.gov/vuln/detail/CVE-2026-6739","https://github.com/mattermost/mattermost/pull/36197","https://github.com/mattermost/mattermost/pull/36377","https://github.com/mattermost/mattermost/pull/36379","https://github.com/mattermost/mattermost/pull/36380","https://github.com/mattermost/mattermost/pull/36382","https://github.com/mattermost/mattermost/commit/2c89c2f6768fbe4dfd57a21ca38c0aecead8d4a8","https://github.com/mattermost/mattermost/commit/5e159647b16e571b327ac6882f32eae42971f540","https://github.com/mattermost/mattermost/commit/8000e5933526f4fd66b92131db3a1b1f4520dbae","https://github.com/mattermost/mattermost/commit/f0a390b96e4c730daedbaf5190684776730218c7","https://github.com/mattermost/mattermost","https://github.com/mattermost/mattermost/releases/tag/v10.11.16","https://github.com/mattermost/mattermost/releases/tag/v11.5.5","https://github.com/mattermost/mattermost/releases/tag/v11.6.2","https://github.com/mattermost/mattermost/releases/tag/v11.7.0","https://mattermost.com/security-updates"],"severity":{"label":"medium","score":6.7},"sources":[{"source":"osv","source_id":"GHSA-m2w9-h2mm-79qr","url":"https://osv.dev/vulnerability/GHSA-m2w9-h2mm-79qr"}],"summary":"Mattermost doesn't require system-level permission when patching protected default system roles"}