{"action":"Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20260217110922-b7d4a1f1f59b or later.","affected":[{"fixed":"11.4.1","introduced":"11.4.0-rc1"},{"fixed":"11.3.2","introduced":"11.3.0-rc1"},{"fixed":"11.2.3","introduced":"11.2.0-rc1"},{"fixed":"10.11.11","introduced":"10.11.0-rc1"},{"fixed":"8.0.0-20260217110922-b7d4a1f1f59b","introduced":"8.0.0-20260105080200-d27a2195068d"}],"component":"github.com/mattermost/mattermost/server/v8","cve_ids":["CVE-2026-3108"],"ecosystem":"Go","epss":0.00283,"exploited":false,"fixed_versions":["11.4.1","11.3.2","11.2.3","10.11.11","8.0.0-20260217110922-b7d4a1f1f59b"],"ghsa_id":"GHSA-3439-vqgj-2gcf","id":"tcs_01M5KET4Q0289WV7FBP9ZKH221","modified_at":"2026-06-25T18:56:37.382720133Z","published_at":"2026-03-26T18:31:42Z","references":["https://osv.dev/vulnerability/GHSA-3439-vqgj-2gcf","https://nvd.nist.gov/vuln/detail/CVE-2026-3108","https://github.com/mattermost/mattermost","https://mattermost.com/security-updates"],"severity":{"label":"high","score":8},"sources":[{"source":"osv","source_id":"GHSA-3439-vqgj-2gcf","url":"https://osv.dev/vulnerability/GHSA-3439-vqgj-2gcf"}],"summary":"Mattermost allows attackers to manipulate administrator terminals via crafted messages containing ANSI and OSC escape sequences"}