CVE-2026-5170
Medium
Description
A user with access to the cluster with a limited set of privilege actions can trigger a crash of a mongod process during the limited and unpredictable window when the cluster is being promoted from a replica set to a sharded cluster. This may cause a denial of service by taking down the primary of the replica set. This issue affects MongoDB Server v8.2 versions prior to 8.2.2, MongoDB Server v8.0 versions between 8.0.18, MongoDB Server v7.0 versions between 7.0.31.
SeverityMedium
CVSS5.3
Exploit probability—
Product
Mongodb
PublishedMar 30, 2026
First seenMar 30, 2026
Weakness typeCWE-617CWE-617
How to fix
Update
- mongodb mongodb7.0.31, 8.0.18, 8.2.2 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mongodb mongodb | 7.0.0 ≤ v < 7.0.31, 8.0.0 ≤ v < 8.0.18, 8.2.0 ≤ v < 8.2.2 | 7.0.31, 8.0.18, 8.2.2 |
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