CVE-2026-13055
Medium
Description
The `$_internalIndexKey` aggregation expression can be used by any authenticated user to crash a MongoDB server (mongod). The expression fails to handle compound wildcard index specifications, triggering an internal consistency check that aborts the server process. The user must be able to run an aggregation pipeline.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Mongodb
PublishedJul 22, 2026
First seenJul 22, 2026
Weakness typeCWE-617CWE-617
How to fix
Update
- mongodb mongodb7.0.39, 8.0.28, 8.2.12, 8.3.7 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mongodb mongodb | 7.0.0 ≤ v < 7.0.39, 8.0.0 ≤ v < 8.0.28, 8.2.0 ≤ v < 8.2.12, 8.3.0 ≤ v < 8.3.7 | 7.0.39, 8.0.28, 8.2.12, 8.3.7 |
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