CVE-2026-3115
- Source
- https://cve.org/CVERecord?id=CVE-2026-3115
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-3115.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-3115
- Aliases
- Published
- 2026-03-26T16:23:05.887Z
- Modified
- 2026-07-08T08:05:02.382128830Z
- 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
- Guest users can view group member IDs without respecting view restrictions
- Details
-
Mattermost versions 11.2.x <= 11.2.2, 10.11.x <= 10.11.10, 11.4.x <= 11.4.0, 11.3.x <= 11.3.1 fail to apply view restrictions when retrieving group member IDs, which allows authenticated guest users to enumerate user IDs outside their allowed visibility scope via the group retrieval endpoint.. Mattermost Advisory ID: MMSA-2026-00594
- Database specific
{ "unresolved_ranges": [ { "source": "AFFECTED_FIELD", "extracted_events": [ { "introduced": "11.2.0" }, { "last_affected": "11.2.2" }, { "introduced": "10.11.0" }, { "last_affected": "10.11.10" }, { "introduced": "11.4.0" }, { "last_affected": "11.4.0" }, { "introduced": "11.3.0" }, { "last_affected": "11.3.1" } ] } ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3115.json", "cna_assigner": "Mattermost", "cwe_ids": [ "CWE-863" ] }- References
Affected packages
Git / github.com/mattermost/mattermost
Affected ranges
- Type
- GIT
- Repo
- https://github.com/mattermost/mattermost
- Events
-
IntroducedFixedIntroducedFixedIntroducedFixedIntroduced
- Database specific
{ "source": [ "CPE_RANGE", "CPE_STRING" ], "cpe": [ "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*", "cpe:2.3:a:mattermost:mattermost_server:11.4.0:*:*:*:*:*:*:*" ], "extracted_events": [ { "introduced": "10.11.0" }, { "fixed": "10.11.11" }, { "introduced": "11.2.0" }, { "fixed": "11.2.3" }, { "introduced": "11.3.0" }, { "fixed": "11.3.2" }, { "introduced": "11.4.0" }, { "last_affected": "11.4.0" } ] }
Affected versions
11.*
11.4.0
@mattermost/client@10.*
@mattermost/client@10.11.0
@mattermost/client@11.*
@mattermost/client@11.3.0
@mattermost/types@10.*
@mattermost/types@10.11.0
@mattermost/types@11.*
@mattermost/types@11.3.0
mattermost-redux@10.*
mattermost-redux@10.11.0
mattermost-redux@11.*
mattermost-redux@11.3.0
v10.*
v10.11.0
v10.11.0-rc3
v10.11.1
v10.11.1-rc1
v10.11.10
v10.11.11-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.*
v11.2.0
v11.2.1
v11.2.1-rc1
v11.2.2
v11.3.0
v11.3.0-rc3
v11.3.0-rc4
v11.3.1
v11.3.1-rc1