medium4.3
CVE-2026-28736
** UNSUPPORTED WHEN ASSIGNED ** Focalboard version 8.0 fails to validate file ownership when serving uploaded files.
Impact
** 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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/mattermost/focalboard | <= 7.10.6 | none recorded |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mattermost | Focalboard | Version 8.0.0 |