CVE-2026-6334 OAuth authorization code client binding not enforced during token redemption in Mattermost

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.. Mattermo...

Mattermost 安全漏洞

Mattermost is an open source collaboration platform from Mattermost, Inc. in the United States. A security vulnerability exists in Mattermost that stems from insufficient validation of code exchange tokens, which could lead to account takeover. The following versions are affected: version 11.0.2...