{"action":"Upgrade github.com/mattermost/mattermost-server to 10.11.11+incompatible or later.","affected":[{"fixed":"10.11.11+incompatible","introduced":"10.11.0-rc1+incompatible"},{"fixed":"11.2.3+incompatible","introduced":"11.2.0-rc1+incompatible"},{"fixed":"11.3.2+incompatible","introduced":"11.3.0-rc1+incompatible"},{"fixed":"11.4.1+incompatible","introduced":"11.4.0-rc1+incompatible"}],"component":"github.com/mattermost/mattermost-server","cve_ids":["CVE-2026-3108"],"ecosystem":"Go","epss":0.00283,"exploited":false,"fixed_versions":["10.11.11+incompatible","11.2.3+incompatible","11.3.2+incompatible","11.4.1+incompatible"],"ghsa_id":"GHSA-3439-vqgj-2gcf","id":"tcs_01M5KGHKGFAN7Q0QF8NSDCWE1Q","modified_at":"2026-06-25T18:45:16.203887202Z","published_at":"2026-06-25T18:26:48Z","references":["https://osv.dev/vulnerability/GO-2026-5067","https://github.com/advisories/GHSA-3439-vqgj-2gcf","https://nvd.nist.gov/vuln/detail/CVE-2026-3108","https://mattermost.com/security-updates"],"severity":{"label":"high","score":8.8},"sources":[{"source":"osv","source_id":"GO-2026-5067","url":"https://osv.dev/vulnerability/GO-2026-5067"},{"source":"nvd","source_id":"CVE-2026-3108","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-3108"}],"summary":"Mattermost allows attackers to manipulate administrator terminals via crafted messages containing ANSI and OSC escape sequences in github.com/mattermost/mattermost-server"}