CVE-2026-3473
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Improper file ownership validation in the Boards API allows unauthorised file access
Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to validate file ownership and access control, which allows an authenticated user to access and download files belonging to other users or teams via crafted Boards API requests using valid file IDs.. Mattermost Advisory ID: MMSA-2026-00620
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Mattermost
- Vendor
- Mattermost
- Product
- Mattermost
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 11.6.0 | affected | semver | Unavailable | 11.6.0 | None listed |
| 11.5.0 | affected | semver | Unavailable | 11.5.3 | None listed |
| 11.4.0 | affected | semver | Unavailable | 11.4.4 | None listed |
| 10.11.0 | affected | semver | Unavailable | 10.11.14 | None listed |
| 11.7.0 | unaffected | Unavailable | Unavailable | Unavailable | None listed |
| 11.6.1 | unaffected | Unavailable | Unavailable | Unavailable | None listed |
| 11.5.4 | unaffected | Unavailable | Unavailable | Unavailable | None listed |
| 11.4.5 | unaffected | Unavailable | Unavailable | Unavailable | None listed |
| 10.11.15 | unaffected | Unavailable | Unavailable | Unavailable | None listed |