CVE-2026-8199

Post-auth memory exhaustion via bitwise match expressions

State: Published
Severity: 7.1 High
Published: May 13, 2026
Updated: May 13, 2026
Reserved: May 8, 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.

Scores

CVSS	Score	Vector	Source
4.0	7.1 High	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	mongodb
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	mongodb

Weaknesses

CWE-1325 Improperly Controlled Sequential Memory Allocation

Affected Products

Product	Versions
MongoDB ServerMongoDB, Inc.	7.0 to before 7.0.34Affected 8.0 to before 8.0.23Affected 8.2 to before 8.2.9Affected 8.3 to before 8.3.2Affected

References

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

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