{"action":"No fix published. Pin and monitor.","affected":[{"introduced":"0"}],"component":"github.com/mattermost/mattermost-server/v5","cve_ids":["CVE-2026-26246"],"ecosystem":"Go","epss":0.00225,"exploited":false,"fixed_versions":[],"ghsa_id":"GHSA-44mv-jq72-gj49","id":"tcs_01M5KGFJSTHHY3EPEFM417VSGE","modified_at":"2026-04-16T22:45:16.746566Z","published_at":"2026-03-23T18:14:47Z","references":["https://osv.dev/vulnerability/GO-2026-4727","https://nvd.nist.gov/vuln/detail/CVE-2026-26246","https://mattermost.com/security-updates"],"severity":{"label":"medium","score":4.3},"sources":[{"source":"osv","source_id":"GO-2026-4727#Go/github.com/mattermost/mattermost-server/v5","url":"https://osv.dev/vulnerability/GO-2026-4727"},{"source":"nvd","source_id":"CVE-2026-26246","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-26246"}],"summary":"Mattermost fails to bound memory allocation when processing PSD image files in github.com/mattermost/mattermost-server"}