Memory Usage Vulnerability in MongoDB Server by MongoDB
CVE-2026-8199

7.1HIGH

Key Information:

Vendor

Mongodb, Inc.

Status
Mongodb Server
Vendor
CVE Published:
13 May 2026

What is CVE-2026-8199?

An authenticated user can exploit a vulnerability within MongoDB Server by triggering excessive memory usage through the processing of bitwise match expression abstract syntax trees. Specifically, variables such as $bitsAllSet, $bitsAnySet, $bitsAllClear, and $bitsAnyClear can lead to significant memory pressure, ultimately risking availability due to out-of-memory (OOM) conditions. This could potentially disrupt service and affect overall application stability for systems using the impacted versions.

Affected Version(s)

MongoDB Server 7.0 < 7.0.34

MongoDB Server 8.0 < 8.0.23

MongoDB Server 8.2 < 8.2.9

References

https://jira.mongodb.org/browse/SERVER-122449
issue-tracking

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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