Is CVE-2026-18712 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-18712?

CVE-2026-18712 has a CVSS v3 severity of HIGH (8.1).

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CVE-2026-18712

Description

An issue in MongoDB Server's Queryable Encryption maintenance operations could allow an authenticated user with privileges on one encrypted collection to cause unauthorized modification or destruction of data belonging to a different collection. This is due to insufficient validation of certain internal metadata references before they are used to perform operations on other namespaces.