CVE-2026-28735
- Source
- https://cve.org/CVERecord?id=CVE-2026-28735
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-28735.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-28735
- Aliases
- Published
- 2026-05-22T16:26:04.066Z
- Modified
- 2026-07-15T01:49:18.368281445Z
- Severity
-
- 5.4 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
- Summary
- GitHub OAuth Scope Validation
- 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 the OAuth token scope on the callback which allows an authenticated Mattermost user to gain access to private repositories via modifying the scope parameter in the GitHub authorization URL.. Mattermost Advisory ID: MMSA-2026-00628
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28735.json", "cwe_ids": [ "CWE-863" ], "unresolved_ranges": [ { "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" } ], "source": "AFFECTED_FIELD" } ], "cna_assigner": "Mattermost" }- References
Affected packages
Git / github.com/mattermost/mattermost
Affected ranges
- Type
- GIT
- Repo
- https://github.com/mattermost/mattermost
- Events
-
IntroducedFixedIntroducedFixedIntroducedFixedIntroducedFixed
- Database specific
{ "cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*", "source": "CPE_RANGE", "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