Is CVE-2026-18704 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-18704?

CVE-2026-18704 has a CVSS v3 severity of MEDIUM (6.5).

Back

CVE-2026-18704

Description

An issue in MongoDB Server's aggregation framework could allow an authenticated user with only read privileges to perform write operations against collections they should not be able to modify. This is due to an internal-use aggregation stage being reachable by external clients without an appropriate authorization check on its embedded operations.