{"action":"Upgrade github.com/mattermost/mattermost-server to 10.11.2+incompatible or later.","affected":[{"fixed":"10.11.2+incompatible","introduced":"10.11.0-rc1+incompatible"},{"fixed":"11.2.4+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-2026-20719"],"ecosystem":"Go","epss":0.00358,"exploited":false,"fixed_versions":["10.11.2+incompatible","11.2.4+incompatible","11.3.2+incompatible","11.4.1+incompatible"],"ghsa_id":"GHSA-86vc-mg26-fj6x","id":"tcs_01M5KGJXEX39M58YCSYRP6FAHF","modified_at":"2026-06-25T19:45:21.545233502Z","published_at":"2026-06-25T18:43:15Z","references":["https://osv.dev/vulnerability/GO-2026-5245","https://github.com/advisories/GHSA-86vc-mg26-fj6x","https://nvd.nist.gov/vuln/detail/CVE-2026-20719","https://mattermost.com/security-updates"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GO-2026-5245","url":"https://osv.dev/vulnerability/GO-2026-5245"},{"source":"nvd","source_id":"CVE-2026-20719","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-20719"}],"summary":"Mattermost: Authenticated DoS through failure to prevent rendering of external SVGs on link embeds in github.com/mattermost/mattermost-server"}