CVE-2026-28735
| Summary |
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
|
| Publication Date |
May 23, 2026, 2:16 a.m. |
| Registration Date |
May 27, 2026, 4:05 a.m. |
| Last Update |
May 23, 2026, 4:28 a.m. |
|
CVSS3.1 : MEDIUM
|
| スコア |
5.4
|
| Vector |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
| 攻撃元区分(AV) |
ネットワーク |
| 攻撃条件の複雑さ(AC) |
低 |
| 攻撃に必要な特権レベル(PR) |
低 |
| 利用者の関与(UI) |
不要 |
| 影響の想定範囲(S) |
変更なし |
| 機密性への影響(C) |
低 |
| 完全性への影響(I) |
低 |
| 可用性への影響(A) |
なし |
Affected software configurations
| Configuration1 |
or higher |
or less |
more than |
less than |
| cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* |
10.11.0 |
|
|
10.11.15 |
| cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* |
11.4.0 |
|
|
11.4.5 |
| cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* |
11.5.0 |
|
|
11.5.4 |
| cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* |
11.6.0 |
|
|
11.6.1 |
Related information, measures and tools
Common Vulnerabilities List