PT-2026-30042 · Unknown · Focalboard

Published 2026-04-03 · Updated 2026-04-28 · CVE-2026-28736

Positive Technologies (AI Summary)

CVSS v3.1

4.3

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Name of the Vulnerable Software and Affected Versions Focalboard version 8.0

Description Focalboard version 8.0 does not properly validate file ownership when serving uploaded files. This allows an authenticated attacker with knowledge of a victim's fileID to read the file's content. The product is no longer maintained and no fix will be issued.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

IDOR

Weakness Enumeration

CWE-639

Related Identifiers

CVE-2026-28736

GHSA-VPH7-R229-QXPF

Affected Products

Focalboard

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-28736 · Security Note
• https://osv.dev/vulnerability/GHSA-vph7-r229-qxpf · Vendor Advisory
• https://github.com/mattermost-community/focalboard · Note
• https://t.me/cveNotify/161172 · Telegram Post
• https://twitter.com/VulmonFeeds/status/2040079259318821284 · Twitter Post
• https://twitter.com/CVEnew/status/2040111911824691675 · Twitter Post