CVE-2026-28736
** 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.
- CVSS 3.1
- 4.3
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 12% of CVEs (scores of 2026-10-25)
- CWE
- CWE-639
- Published
- Modified
- Record from
- the NVD, synced
Affected
- mattermost:focalboard
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-vph7-r229-qxpf | Go | github.com/mattermost/focalboard | <=7.10.6 | no fix published |
| GO-2026-5670 | Go | github.com/mattermost/focalboard | all versions | no fix published |