VULNERABILITY INTELLIGENCE

CVE-2026-28736

CVSS score4.3 MEDIUM
EPSS probability0.23%
CISA KEVNot currently listed
Published2026-04-03
Last modified2026-10-23
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

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.

Weakness classification

  • responsibledisclosure@mattermost.com: CWE-639

Primary references