{"id":"CVE-2026-28736","revision":"11984e194f424f1daf2db8a09d0c9f60","records":[{"revision":"11984e194f424f1daf2db8a09d0c9f60","observedAt":"2026-10-25T07:19:03.231+00:00","statement":{"source":"nvd","id":"CVE-2026-28736","aliases":[],"title":"** UNSUPPORTED WHEN ASSIGNED ** Focalboard version 8.0 fails to validate file ownership when serving uploaded files. This allows an authenticated attacker who knows a victim's fileID to read the content of the file. NOTE: Focalboard as a st…","description":"** UNSUPPORTED WHEN ASSIGNED ** Focalboard version 8.0 fails to validate file ownership when serving uploaded files. This allows an authenticated attacker who knows a victim's fileID to read the content of the file. NOTE: Focalboard as a standalone product is not maintained and no fix will be issued.","state":0,"publishedAt":"2026-04-03T14:16:29.517+00:00","modifiedAt":"2026-10-23T22:10:00.16+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · responsibledisclosure@mattermost.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","score":4.3,"severity":"MEDIUM"}],"references":["https://github.com/mattermost-community/focalboard"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-28736","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-639"],"productCriteria":["cpe:2.3:a:mattermost:focalboard:8.0.0:*:*:*:*:*:*:*"],"sourceDates":{"published":"2026-04-03T14:16:29.517","lastModified":"2026-10-23T22:10:00.160"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-28736","identifiers":["CVE-2026-28736"]},"retained":false,"historicalAffected":[]}],"coverage":[]}