VULNERABILITY INTELLIGENCE
CVE-2026-40872
EPSS probability0.36%
CISA KEVNot currently listed
Published2026-04-21
Last modified2026-10-26
Description
mailcow: dockerized is an open source groupware/email suite based on docker. In versions prior to 2026-03b, the admin dashboard's Autodiscover logs render the EMailAddress value (logged as the "user" field) without HTML escaping. By submitting an unauthenticated Autodiscover request with a crafted EMailAddress containing HTML/JS, the payload is stored in Redis and executed when an admin views the Autodiscover logs. Version 2026-03b fixes the vulnerability.
Weakness classification
- security-advisories@github.com: CWE-79