Critical severityNVD Advisory· Published Apr 21, 2026· Updated Apr 22, 2026
CVE-2026-40872
CVE-2026-40872
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
1- Range: <2026-03b
Patches
Vulnerability mechanics
References
1News mentions
1- ⚡ Weekly Recap: Fast16 Malware, XChat Launch, Federal Backdoor, AI Employee Tracking & MoreThe Hacker News · Apr 27, 2026