CVE-2026-18688
High
Description
An issue in MongoDB Server's aggregation framework could allow an authenticated user to trigger an out-of-bounds memory read by providing a specially formed numeric parameter in a certain aggregation pipeline stage. This could result in a server crash (denial of service) and may potentially expose a limited amount of memory contents.
SeverityHigh
CVSS7.1
Exploit probability34. percentile0.4%
Product
Mongodb
PublishedAug 11, 2026
First seenAug 11, 2026
Weakness typeCWE-125Out-of-bounds read
How to fix
Update
- mongodb mongodb7.0.40, 8.0.29, 8.3.8 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mongodb mongodb | 7.0.0 ≤ v < 7.0.40, 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 | 7.0.40, 8.0.29, 8.3.8 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.