CVE-2026-18687

HIGH

Improper Validation in MongoDB Queryable Encryption Maintenance Operation Leads to Denial of Service and Index Corruption

Title source: CVE List
STIX 2.1 vulnerability

Record summary

CVE-2026-18687 has a selected CVSS score of 7.1 (high).

Description

MongoDB Server's handling of a Queryable Encryption maintenance operation did not properly validate certain request parameters against the collection's encrypted field configuration before use. An authenticated user with readWrite privileges could submit a specially formed request that leads to a server crash or excessive internal writes, resulting in resource exhaustion and corruption of encrypted index data.

Description source: CVE List

Exploitation context

CISA SSVC decision

ExploitationNone
AutomatableNo
Technical impactPartial

CISA Coordinator · SSVC 2.0.3 · Evaluated Aug 11, 2026 · Source: CVE List

Affected products and versions

1
ProductSourceVersion range

MongoDB Server

Browse MongoDB / MongoDB Server

Default status: unaffected

CVE List8.3.0 to < 8.3.8affected
8.0 to < 8.0.29affected

References

2