{"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":"11.2.4","introduced":"11.2.0-rc1"},{"fixed":"8.0.0-20260217110922-b7d4a1f1f59b","introduced":"8.0.0-20260105080200-d27a2195068d"},{"fixed":"10.11.2","introduced":"10.11.0-rc1"}],"component":"github.com/mattermost/mattermost/server/v8","cve_ids":["CVE-2026-20719"],"ecosystem":"Go","epss":0.00358,"exploited":false,"fixed_versions":["11.4.1","11.3.2","11.2.4","8.0.0-20260217110922-b7d4a1f1f59b","10.11.2"],"ghsa_id":"GHSA-86vc-mg26-fj6x","id":"tcs_01M5KF38HWWQMA16PYDFZTY0MC","modified_at":"2026-06-25T19:56:32.224939542Z","published_at":"2026-03-25T18:31:48Z","references":["https://osv.dev/vulnerability/GHSA-86vc-mg26-fj6x","https://nvd.nist.gov/vuln/detail/CVE-2026-20719","https://github.com/mattermost/mattermost","https://mattermost.com/security-updates"],"severity":{"label":"medium","score":4.3},"sources":[{"source":"osv","source_id":"GHSA-86vc-mg26-fj6x","url":"https://osv.dev/vulnerability/GHSA-86vc-mg26-fj6x"}],"summary":"Mattermost: Authenticated DoS through failure to prevent rendering of external SVGs on link embeds"}