CVE-2026-40871
HighCVSS 7.2Exploitation Probability (EPSS)
Very high risk95th percentile - higher than 95% of all known CVEs
Summary
mailcow: dockerized to otwarte oprogramowanie do grupowej pracy i obsługi poczty, które przed wersją 2026-03b zawiera drugorzędną podatność na wstrzyknięcie SQL w polu quarantine_category poprzez API Mailcow. Punkt końcowy /api/v1/add/mailbox przechowuje quarantine_category bez walidacji lub sanitizacji, co prowadzi do wstrzyknięcia SQL podczas wykonywania zadania powiadamiania o kwarantannie.
Risk Assessment
Podatność ta umożliwia atakującemu wstrzyknięcie dowolnego SQL, co może prowadzić do wykradzenia wrażliwych danych, takich jak dane logowania administratora, które mogą być następnie wyświetlane w e-mailach powiadamiających o kwarantannie. Organizacja narażona jest na utratę poufnych informacji oraz potencjalne naruszenie bezpieczeństwa.
Recommendation
Zaleca się aktualizację do wersji 2026-03b lub nowszej, aby usunąć tę podatność. Dodatkowo, warto wdrożyć mechanizmy walidacji i sanitizacji danych wprowadzanych przez użytkowników w API.
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Original NVD description (English source)
mailcow: dockerized is an open source groupware/email suite based on docker. Versions prior to 2026-03b have a second-order SQL injection vulnerability in the quarantine_category field via the Mailcow API. The /api/v1/add/mailbox endpoint stores quarantine_category without validation or sanitization. This value is later used by quarantine_notify.py, which constructs SQL queries using unsafe % string formatting instead of parameterized queries. This results in a delayed (second-order) SQL injection when the quarantine notification job executes, allowing an attacker to inject arbitrary SQL. Using a UNION SELECT, sensitive data (e.g., admin credentials) can be exfiltrated and rendered inside quarantine notification emails. Version 2026-03b fixes the vulnerability.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

