CVE-2026-28736

4.3 Moyenne

Publiée le 03/04/2026 à 16:16 · Modifiée le 24/10/2026 à 00:10 · Analysée par le NVD · Source : responsibledisclosure@mattermost.com

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.

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Produits concernés

Mattermost Focalboard

Scores CVSS

Version	Score	Source	Vecteur
3.1	4.3 Moyenne	responsibledisclosure@mattermost.com	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N`

Faiblesses (CWE)

CWE-639

Références

https://github.com/mattermost-community/focalboard Product

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories