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.
Published: 2026-04-03
Score: 4.3 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

No remediation available yet.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Fri, 03 Apr 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 03 Apr 2026 14:00:00 +0000

Type Values Removed Values Added
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.
Title Focalboard IDOR in file content endpoint allows cross-user file access (unsupported product, no fix)
Weaknesses CWE-639
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'}


Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: Mattermost

Published:

Updated: 2026-04-03T14:54:37.869Z

Reserved: 2026-04-03T13:10:59.177Z

Link: CVE-2026-28736

cve-icon Vulnrichment

Updated: 2026-04-03T14:54:21.095Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-04-03T14:16:29.517

Modified: 2026-04-03T16:10:23.730

Link: CVE-2026-28736

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses