{"action":"No fix published. Pin and monitor.","affected":[{"introduced":"0"}],"component":"github.com/mattermost/mattermost-server/v6","cve_ids":["CVE-2026-4055"],"ecosystem":"Go","epss":0.00152,"exploited":false,"fixed_versions":[],"ghsa_id":"GHSA-6cfr-wp44-6qmv","id":"tcs_01M5KGJE85CBZ7F2HR2KNQATYT","modified_at":"2026-06-25T18:45:13.495177229Z","published_at":"2026-06-25T18:26:48Z","references":["https://osv.dev/vulnerability/GO-2026-5173","https://github.com/advisories/GHSA-6cfr-wp44-6qmv","https://nvd.nist.gov/vuln/detail/CVE-2026-4055","https://mattermost.com/security-updates"],"severity":{"label":"medium","score":4.3},"sources":[{"source":"osv","source_id":"GO-2026-5173#Go/github.com/mattermost/mattermost-server/v6","url":"https://osv.dev/vulnerability/GO-2026-5173"},{"source":"nvd","source_id":"CVE-2026-4055","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4055"}],"summary":"Mattermost has an Incorrect Authorization issue in github.com/mattermost/mattermost-server"}