CVE-2026-3473
- Source
- https://cve.org/CVERecord?id=CVE-2026-3473
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-3473.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-3473
- Aliases
- Published
- 2026-05-22T10:27:02.600Z
- Modified
- 2026-07-08T08:12:52.593824646Z
- Severity
-
- 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N CVSS Calculator
- Summary
- Improper file ownership validation in the Boards API allows unauthorised file access
- Details
-
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
- Database specific
{ "unresolved_ranges": [ { "source": "AFFECTED_FIELD", "extracted_events": [ { "introduced": "11.6.0" }, { "last_affected": "11.6.0" }, { "introduced": "11.5.0" }, { "last_affected": "11.5.3" }, { "introduced": "11.4.0" }, { "last_affected": "11.4.4" }, { "introduced": "10.11.0" }, { "last_affected": "10.11.14" } ] } ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3473.json", "cna_assigner": "Mattermost", "cwe_ids": [ "CWE-639" ] }- References
Affected packages
Git / github.com/mattermost/mattermost
Affected ranges
- Type
- GIT
- Repo
- https://github.com/mattermost/mattermost
- Events
-
IntroducedFixedIntroducedFixedIntroducedFixedIntroducedFixed
- Database specific
{ "source": "CPE_RANGE", "cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*", "extracted_events": [ { "introduced": "10.11.0" }, { "fixed": "10.11.15" }, { "introduced": "11.4.0" }, { "fixed": "11.4.5" }, { "introduced": "11.5.0" }, { "fixed": "11.5.4" }, { "introduced": "11.6.0" }, { "fixed": "11.6.1" } ] }
Affected versions
@mattermost/client@10.*
@mattermost/client@10.11.0
@mattermost/client@11.*
@mattermost/client@11.4.0
@mattermost/types@10.*
@mattermost/types@10.11.0
@mattermost/types@11.*
@mattermost/types@11.4.0
mattermost-redux@10.*
mattermost-redux@10.11.0
mattermost-redux@11.*
mattermost-redux@11.4.0
v10.*
v10.11.0
v10.11.0-rc3
v10.11.1
v10.11.1-rc1
v10.11.10
v10.11.11
v10.11.11-rc1
v10.11.11-rc2
v10.11.12
v10.11.13
v10.11.13-rc1
v10.11.14
v10.11.14-rc1
v10.11.2
v10.11.2-rc1
v10.11.2-rc2
v10.11.3
v10.11.4
v10.11.4-rc1
v10.11.4-rc2
v10.11.4-rc3
v10.11.5
v10.11.6
v10.11.7
v10.11.8
v10.11.9
v10.11.9-rc1
v11.*
v11.4.0
v11.4.0-rc3
v11.4.1
v11.4.1-rc1
v11.4.1-rc2
v11.4.2
v11.4.3
v11.4.4
v11.5.0
v11.5.1
v11.5.2
v11.5.2-rc1
v11.5.2-rc2
v11.5.2-rc3
v11.5.3
v11.6.0