CVE-2026-9699 Mattermost Agents plugin logs unsanitized OpenAI API keys on authentication errors

Mattermost Plugins versions =11.6 10.18.11 11.3.6 11.6.5.0 fail to sanitize error responses from the OpenAI API before logging, which allows a user with access to server logs or support packets to obtain a valid or partially reconstructable OpenAI API key via inspection of mattermost.log entries...