# CVE-2026-8199

## Summary

- **CVE ID:** CVE-2026-8199
- **Severity:** HIGH
- **CVSS Score:** 7.1 (CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-1325
- **Published:** May 13, 2026
- **Last Modified:** May 13, 2026

## 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.

## Affected Products

- MongoDB, Inc. — MongoDB Server (7.0)
- MongoDB, Inc. — MongoDB Server (8.0)
- MongoDB, Inc. — MongoDB Server (8.2)
- MongoDB, Inc. — MongoDB Server (8.3)

## References

- [CNA](https://jira.mongodb.org/browse/SERVER-122449)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.26%
- **EPSS Percentile:** 17.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._