CVE-2026-16044
- Source
- https://cve.org/CVERecord?id=CVE-2026-16044
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-16044.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-16044
- Downstream
- Published
- 2026-08-17T14:26:52Z
- Modified
- 2026-08-20T03:54:11Z
- Severity
-
- 5.4 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L CVSS Calculator
- Summary
- Insufficient validation of guest board admin privileges on archive import
- Details
-
Mattermost versions 11.7.x <= 11.7.6, 10.11.x <= 10.11.21 fail to prevent guest users from receiving Board Admin privileges during board archive import which allows a board member to escalate a guest user to Board Admin via importing a crafted .boardarchive file. Mattermost Advisory ID: MMSA-2026-00672
- Database specific
{ "cna_assigner": "Mattermost", "cwe_ids": [ "CWE-863" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/16xxx/CVE-2026-16044.json", "unresolved_ranges": [ { "extracted_events": [ { "introduced": "11.7.0" }, { "last_affected": "11.7.6" }, { "introduced": "10.11.0" }, { "last_affected": "10.11.21" } ], "source": "AFFECTED_FIELD" } ] }- References
Affected packages
Git / github.com/mattermost/mattermost
Affected ranges
- Type
- GIT
- Repo
- https://github.com/mattermost/mattermost
- Events
- Database specific
-
Show details
{ "cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*", "extracted_events": [ { "introduced": "10.11.0" }, { "fixed": "10.11.22" }, { "introduced": "11.7.0" }, { "fixed": "11.7.7" } ], "source": "CPE_RANGE" }
Affected versions
@mattermost/client@10.*
@mattermost/client@10.11.0
@mattermost/client@11.*
@mattermost/client@11.7.0
@mattermost/shared@11.*
@mattermost/shared@11.7.0
@mattermost/types@10.*
@mattermost/types@10.11.0
@mattermost/types@11.*
@mattermost/types@11.7.0
mattermost-redux@10.*
mattermost-redux@10.11.0
mattermost-redux@11.*
mattermost-redux@11.7.0
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
v10.11.15
v10.11.15-rc1
v10.11.16
v10.11.17
v10.11.18
v10.11.19
v10.11.19-rc1
v10.11.2
v10.11.2-rc1
v10.11.2-rc2
v10.11.20
v10.11.21
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.*
v11.7.0
v11.7.1
v11.7.2
v11.7.3
v11.7.4
v11.7.5
v11.7.5-rc1
v11.7.6