{"action":"Upgrade github.com/mattermost/mattermost-server to 10.11.17+incompatible or later.","affected":[{"fixed":"10.11.17+incompatible","introduced":"10.11.0+incompatible"},{"fixed":"11.5.5+incompatible","introduced":"11.5.0+incompatible"},{"fixed":"11.6.1+incompatible","introduced":"11.6.0+incompatible"}],"component":"github.com/mattermost/mattermost-server","cve_ids":["CVE-2026-6739"],"ecosystem":"Go","epss":0.00462,"exploited":false,"fixed_versions":["10.11.17+incompatible","11.5.5+incompatible","11.6.1+incompatible"],"ghsa_id":"GHSA-m2w9-h2mm-79qr","id":"tcs_01M5KGSYN2RXYH0C12WD3PG5K4","modified_at":"2026-08-26T01:13:02.633880763Z","published_at":"2026-08-25T19:43:10Z","references":["https://osv.dev/vulnerability/GO-2026-6285","https://github.com/advisories/GHSA-m2w9-h2mm-79qr","https://nvd.nist.gov/vuln/detail/CVE-2026-6739","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/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/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":"unknown"},"sources":[{"source":"osv","source_id":"GO-2026-6285","url":"https://osv.dev/vulnerability/GO-2026-6285"}],"summary":"Mattermost doesn't require system-level permission when patching protected default system roles in github.com/mattermost/mattermost-server"}