CVE-2026-8199 Post-auth memory exhaustion via bitwise match expressions
Authenticated users can cause memory exhaustion and denial of service via specific bitwise match expressions in MongoDB Server.
- 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-2026-8199?
CVE-2026-8199 is a high-severity denial of service vulnerability in Mongodb Mongodb, published on 13 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An authenticated user can cause excess memory usage via bitwise match expression AST processing of $bitsAllSet, $bitsAnySet, $bitsAllClear, and $bitsAnyClear. This contributes to memory pressure and may lead to availability loss by OOM.
This issue impacts MongoDB Server v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.
Weakness: CWE-1325
Which versions are affected by CVE-2026-8199?
1 open source package ship an affected version, including mongodb. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mongodb Bitnami | From 7.0.0 | 7.0.34, 8.0.23, 8.2.9, 8.3.2 |
Products include Mongodb Mongodb.
How do I fix CVE-2026-8199?
Upgrade mongodb to a fixed version for your release line: 7.0.34, 8.0.23, 8.2.9 or 8.3.2.
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-2026-8199 being exploited?
There is no known exploitation of CVE-2026-8199 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-2026-8199, GHSA-ch76-jrmh-qm2h, MINI-7xcq-9w2w-x3rg, MINI-hq58-m48w-g68q, MINI-qpwr-xhg8-6x2g, UBUNTU-CVE-2026-8199.