Description
Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to enforce client identity binding during the OAuth authorization code redemption flow which allows an authenticated OAuth client to redeem authorization codes issued to a different client via a crafted token exchange request.. Mattermost Advisory ID: MMSA-2026-00570
CVSS 3.1EPSS 0.11800000000000001%Risk 0.31
View source- Published
- 2026-05-18 08:16:14
- Affected versions
- <=11.5.1,<=10.11.13
- Type
- Core software
- Vector
- CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:N