CVE-2026-18687
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.
SeverityHigh
CVSS7.1
Exploit probability14. percentile0.2%
Product
Mongodb
PublishedAug 11, 2026
First seenAug 11, 2026
Weakness typeCWE-191CWE-191
How to fix
Update
- mongodb mongodb8.0.29, 8.3.8 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mongodb mongodb | 8.0.0 ≤ v < 8.0.29, 8.2.0 ≤ v ≤ 8.2.12, 8.3.0 ≤ v < 8.3.8, 9.0.0, 9.1.0 | 8.0.29, 8.3.8 |
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