CVE-2026-28736
- Source
- https://cve.org/CVERecord?id=CVE-2026-28736
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-28736.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-28736
- Aliases
- Downstream
- Related
- Published
- 2026-04-03T13:25:53Z
- Modified
- 2026-10-15T10:52:01Z
- Severity
-
- 4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
- Summary
- Focalboard IDOR in file content endpoint allows cross-user file access (unsupported product, no fix)
- Details
-
** 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.
- Database specific
{ "cna_assigner": "Mattermost", "cwe_ids": [ "CWE-639" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28736.json" }- References
Affected packages
Git / github.com/mattermost-community/focalboard
Affected ranges
- Type
- GIT
- Repo
- https://github.com/mattermost-community/focalboard
- Events
-
IntroducedLast Affected
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "0" }, { "last_affected": "8.0" } ], "source": "AFFECTED_FIELD", "strategy": "StandardRange" }, { "cpe": "cpe:2.3:a:mattermost:focalboard:8.0.0:*:*:*:*:*:*:*", "range": [ { "introduced": "8.0.0" }, { "last_affected": "8.0.0" } ], "source": "CPE_STRING" } ] }