CVE-2026-19600 Mattermost logs plaintext authentication tokens in debug-level server logs on failed auth attempts

Mattermost versions 11.9.x = 11.9.1, 11.8.x = 11.8.5, 11.7.x = 11.7.10, 11.10.x = 11.10.1 fail to sanitize authentication tokens before writing them to server log entries, which allows an attacker with access to server logs to obtain valid session tokens or OAuth access tokens and impersonate...

CVE-2026-19600 Mattermost logs plaintext authentication tokens in debug-level server logs on failed auth attempts

Mattermost versions 11.9.x = 11.9.1, 11.8.x = 11.8.5, 11.7.x = 11.7.10, 11.10.x = 11.10.1 fail to sanitize authentication tokens before writing them to server log entries, which allows an attacker with access to server logs to obtain valid session tokens or OAuth access tokens and impersonate...

CVE-2026-19600

Mattermost versions 11.9.x <= 11.9.1 , 11.8.x <= 11.8.5 , 11.7.x <= 11.7.10 , and 11.10.x

Mattermost log information leakage vulnerability

Mattermost versions 11.9.1 and earlier of 11.9.x series, 11.8.5 and earlier of 11.8.x series, 11.7.10 and earlier of 11.7.x series, and 11.10.1 and earlier of 11.10.x series have a vulnerability related to log information leakage. This vulnerability arises from the failure to clear the...