CVE-2026-18687 — Improper Validation in MongoDB Queryable Encryption Maintenance Operation Leads to Denial of Service and Index Corrup…

CVE-2026-18687

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

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
MongoDB / MongoDB Server	affected 8.3.0 before 8.3.8; affected 8.0 before 8.0.29

CWE

CWE-191

References

https://jira.mongodb.org/browse/SERVER-130628

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.