CVE-2026-1850 Denial of service in MongoDB Server
An authorized user can crash the MongoDB server by submitting complex queries that cause excessive memory usage in the query planner.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-1850?
CVE-2026-1850 is a high-severity denial of service vulnerability in Mongodb Mongodb, published on 10 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Complex queries can cause excessive memory usage in MongoDB Query Planner resulting in an Out-Of-Memory Crash.
Weakness: CWE-770
Which versions are affected by CVE-2026-1850?
1 open source package ship an affected version, including mongodb. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mongodb Bitnami | From 8.0.0 | 8.0.18, 8.2.4 |
Products include Mongodb Mongodb.
How do I fix CVE-2026-1850?
Upgrade mongodb to a fixed version for your release line: 8.0.18 or 8.2.4.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-1850 being exploited?
There is no known exploitation of CVE-2026-1850 in the wild and no public exploit code.
Other vulnerabilities in Mongodb Mongodb
- CVE-2025-14847 MongoDB and MongoDB Server Improper Handling of Length Parameter Inconsistency
- CVE-2026-82067 Auth bypass in MongoDB Server
- CVE-2026-13072 MongoDB Improper Input Validation in Compute Mode External Data Processing Leading to Memory Corruption
- CVE-2017-15535 Denial of service in n/a
- CVE-2026-18691 Improper Authentication in MongoDB Intra-Cluster Connections Allows Credential Exposure
Sources
Also known as BIT-mongodb-2026-1850, GHSA-v4j3-xhwp-3v3w, MINI-qcm3-c453-5h72.