Is CVE-2026-18697 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-18697?

CVE-2026-18697 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-18697

Description

An issue in MongoDB Server's aggregation framework could allow an unauthenticated party to cause a mongos (router) process to terminate unexpectedly by submitting a specially formed aggregation command. This could result in a denial of service, disrupting client connections routed through the affected mongos instance.