VulnerabilityAnalyzed
CVE-2026-28736
This allows an authenticated attacker who knows a victim's fileID to read the content of the file.
MEDIUM 4.3EPSS 0.22%
Does this matter?
Lower severity and a low EPSS score (0.22%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 4.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 0.22% probability · 13th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-639
- Affected
- mattermost/focalboard
- Source
- responsibledisclosure@mattermost.com
References
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.